An aspiration valve assembly and endoscope handle

Abstract

The utility model provides a kind of suction valve assembly and endoscope handle, it is related to endoscope field, suction valve assembly includes suction water nozzle, suction shell, sealing rod and elastic button, the bottom of suction shell is connected in suction water nozzle, top and the bottom of elastic button are connected;Suction shell is equipped with suction passage along the axial direction, the outer wall of suction shell is equipped with suction connector, suction connector and suction passage are communicated, sealing rod is arranged in suction passage, the top of sealing rod is exposed outside suction passage, and is connected with the top of elastic button, and through hole is equipped on the lateral wall of elastic button;Elastic button has initial state and press state, when initial state, sealing rod closes suction passage between suction connector and suction water nozzle, suction connector is communicated with through hole by suction passage;When press state, suction connector and suction water nozzle are communicated by suction passage, and through hole is closed.Suction valve assembly suction effect is good, structure is simple, and it is convenient to assemble.

Description

Technical Field

[0001] This utility model provides a suction valve assembly and an endoscope handle, belonging to the field of endoscope technology. Background Technology

[0002] An endoscope is a comprehensive instrument combining traditional optics, modern electronics, mechanical structures, and software control. It is used to penetrate deep into orifices to explore the internal environment. It is particularly suitable as a medical device for examining the human body. An endoscope consists of an insertion section inserted into the body and a handle housing connected to the insertion section. The insertion section has a suction channel leading to its front suction port, which is connected to a suction valve assembly on the handle housing via a tube. The suction valve assembly uses negative pressure to aspirate bodily fluids or removed diseased tissue.

[0003] Patent CN 206462962 U discloses an endoscope suction valve structure, including a valve seat, a suction rod, and an elastic element. The valve seat has a through suction channel, and the suction rod is inserted into the suction channel and can undergo axial elastic movement through the elastic element, specifically a spring. The use of a spring in this patent makes the movement of the suction rod smoother. However, using a spring as the elastic element within the valve seat has the following disadvantages: 1. With the same valve seat size, it reduces the size of the suction channel within the valve seat, which is not conducive to the discharge of aspirated waste fluid; 2. When installing the spring, it needs to be sleeved onto the outside of the suction rod, and both ends of the spring need to be fixed or have limiting structures to restrict the displacement of the spring ends, increasing the complexity and assembly difficulty of the suction valve. Summary of the Invention

[0004] Purpose of the invention: To solve the problems existing in the prior art, this utility model provides a suction valve assembly and an endoscope handle, which solves the problems of poor suction effect caused by the elastic element being placed in the suction housing and the complex structure of the suction valve assembly caused by the elastic element.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a suction valve assembly, including a suction nozzle, a suction housing, a sealing rod, and a resilient button. The bottom of the suction housing is connected to the suction nozzle, and the top is connected to the bottom of the resilient button. The suction housing has a suction channel along the axial direction, and a suction connector is provided on the outer wall of the suction housing. The suction connector is connected to the suction channel. The sealing rod is disposed in the suction channel, and the top of the sealing rod protrudes outside the suction channel and is connected to the top of the resilient button. A through hole is provided on the side wall of the resilient button. The resilient button has an initial state and a pressed state. In the initial state, the sealing rod closes the suction channel between the suction connector and the suction nozzle, and the suction connector communicates with the through hole through the suction channel. In the pressed state, the suction connector and the suction nozzle communicate through the suction channel, and the through hole is closed.

[0007] Preferably, the elastic button is made of an elastic material, which can deform under external force and return to its original shape after the external force is removed. The elastic button can be made of materials such as rubber, silicone, or elastic plastic. Because the elastic button is made of an elastic material, the through hole will close due to the squeezing action when pressed.

[0008] Preferably, the suction channel is arranged at the central axis of the suction housing. Regardless of the location of the suction channel, it must pass through both ends of the suction housing.

[0009] The top of the suction housing and the bottom of the elastic button are connected. As a specific embodiment, the elastic button is sealed and installed on the top of the suction housing. The elastic button and the top of the suction housing form a sealed space, and gas can only flow through the through hole.

[0010] As a specific embodiment, the upper outer periphery of the sealing rod is connected to multiple support plates along the length of the sealing rod, and a fluid channel is formed between two adjacent support plates; in the initial state, the through hole is open, one end of the fluid channel is located inside the elastic button, and the other end is located inside the suction channel; in the pressed state, the fluid channel is sealed inside the suction channel.

[0011] In this design, when the elastic button is pressed, the fluid channel is sealed within the suction channel, and the through hole is closed. This double protection prevents the suction connector from communicating with the outside through the through hole, ensuring that the suction connector can only communicate with the suction nozzle through the suction channel.

[0012] As a specific embodiment, the upper part of the sealing rod is provided with a connecting plate, the bottom surface of the connecting plate is connected to the top surface of the support plate; the connecting plate is provided with a third annular groove, the third sealing ring is embedded in the third annular groove, and its circumferential contour portion extends to the outside of the third annular groove; the outer diameter of the connecting plate is smaller than the inner diameter of the suction channel, and the outermost diameter of the third sealing ring is larger than the inner diameter of the suction channel; when the elastic button is pressed, the third sealing ring seals the suction channel.

[0013] As one specific embodiment, the upper outer periphery of the sealing rod is connected to multiple support plates along the length of the sealing rod, and a fluid channel is formed between two adjacent support plates; in the initial state, the through hole of the elastic button is open, one end of the fluid channel is located inside the elastic button, and the other end is located inside the suction channel.

[0014] Preferably, in this solution, the position of the fluid channel is not particularly restricted when the elastic button is pressed; one end of the fluid channel may be located inside the elastic button, and the other end may be located inside the suction channel. Alternatively, the entire fluid channel may be located inside the suction channel.

[0015] As one specific embodiment, the support plate and the sealing rod are integrally formed; the multiple support plates are of the same size, and the outer peripheral surfaces of the multiple support plates form an enveloping cylindrical surface, the diameter of which is 0.2-1.2 mm smaller than the inner diameter of the suction channel.

[0016] Preferably, the sealing rod, connecting plate, and support plate are integrally injection molded from non-metallic materials, wherein the sealing rod is elongated. It is worth noting that the support plate is integrally molded on the outer periphery of the sealing rod. This design allows the fluid channel formed between two adjacent support plates to be located on the outside of the sealing rod. With the same suction structure dimensions, the fluid channel is larger, making it less likely for solid substances in the waste liquid to clog the fluid channel. Furthermore, integrally molding the support plate on the outer periphery of the sealing rod is more convenient, facilitating integral injection molding. Since the non-metallic sealing rod has an elongated structure, it is prone to breakage during use. The integral molding of the support plate on the outer periphery of the sealing rod also provides structural reinforcement, preventing breakage during use. Simultaneously, the integral molding of the support plate on the outer periphery of the sealing rod also serves as a guide, preventing wobbling during the sealing rod's vertical movement and ensuring that the sealing rod's position does not shift after downward movement, thus guaranteeing the sealing effect on the suction channel.

[0017] As a specific embodiment, the suction channel comprises, from top to bottom, a first channel segment, a second channel segment, and a third channel segment connected together. The inner diameter of the second channel segment is smaller than the inner diameter of the first channel segment, and the inner diameter of the second channel segment is smaller than the inner diameter of the third channel segment. The bottom of the sealing rod is provided with a sealing part, and the outer periphery of the sealing part is provided with a first annular groove. The first sealing ring is embedded in the first annular groove, and its circumferential contour extends to the outside of the first annular groove. The outer diameter of the first sealing ring is smaller than the inner diameter of the third channel segment and larger than the inner diameter of the second channel segment. When the elastic button is in the initial state, the first sealing ring is located at the connection between the third channel segment and the second channel segment.

[0018] Preferably, the connection between the first channel segment and the second channel segment is made by a circular arc transition, and the connection between the second channel segment and the third channel segment is made by a circular arc transition. The circular arc transition can achieve a smooth transition.

[0019] Preferably, the sealing part is integrally formed at the bottom of the sealing rod. The sealing rod and the sealing part are made of the same material, both being non-deformable rigid materials, such as plastic. Both the sealing rod and the sealing part are cylindrical, with the diameter of the sealing part being larger than the diameter of the sealing rod. By setting a sealing ring on the sealing part, it is beneficial to seal the connection between the third channel segment and the second channel segment.

[0020] As one specific embodiment, the top of the sealing rod is connected to a top plate, and a connecting plate is provided on the upper part of the sealing rod, forming an installation annular groove between the connecting plate and the top plate; the elastic button includes a top wall and side walls with openings at both ends, the top wall is connected to the top of the side walls and seals the top openings of the side walls, the top surface of the top wall has a receiving cavity, and the top wall has a receiving hole that penetrates the top wall; the top plate of the sealing rod is connected to the receiving cavity, and the installation annular groove is located in the receiving hole.

[0021] Preferably, the sealing rod and its top plate are integrally formed by injection molding. That is, the sealing rod, connecting plate, support plate, and top plate are integrally formed by injection molding, and the injection molding process can also form a third annular groove and an installation annular groove.

[0022] Preferably, the elastic button is integrally molded, that is, the top wall and the side wall are integrally molded. Further, the inner ring at the bottom of the side wall has a connecting protrusion, which attracts the connecting protrusion of the top of the housing and the elastic button to engage. By providing the connecting protrusion, it is easy to attract the connection of the elastic button of the housing.

[0023] In one specific embodiment, the suction nozzle includes a first cavity and a second cavity connected from top to bottom. A second sealing ring is connected to the outer periphery of the bottom of the suction housing. The inner diameter of the first cavity is larger than the inner diameter of the second cavity, the inner diameter of the second cavity is larger than the outer diameter of the bottom of the suction housing, and the inner diameter of the second cavity is smaller than the outer diameter of the second sealing ring. A limiting protrusion is provided in the second cavity of the suction nozzle. When the elastic button is pressed, the bottom of the sealing rod connects with the limiting protrusion. The limiting protrusion prevents clogging of the bottom of the suction nozzle.

[0024] Preferably, the bottom of the suction nozzle is provided with a pipe connector, which is connected to the second cavity. The pipe connector is used to communicate with the working channel of the endoscope to realize negative pressure suction or waste liquid transportation.

[0025] Preferably, the limiting protrusion is arranged along the length of the sealing rod, and the bottom of the limiting protrusion is located above the pipe joint, so that the pipe joint will not be blocked even if the sealing rod moves down to the bottom.

[0026] Preferably, the diameter of the pipe joint is smaller than the inner diameter of the second cavity, the pipe joint is connected to the center position at the bottom of the second cavity, and the limiting protrusion does not obstruct the pipe joint, nor does it obstruct the flow section of the pipe joint.

[0027] Secondly, this utility model provides an endoscope handle, which includes a handle housing and the suction valve assembly described in any one of the above claims; the handle housing is provided with a first arc-shaped portion, a second arc-shaped portion, and a third arc-shaped portion that are parallel to each other from the outside to the inside, a first receiving groove is formed between the first arc-shaped portion and the second arc-shaped portion, and a second receiving groove is formed between the second arc-shaped portion and the third arc-shaped portion; the outer periphery of the suction housing is provided with a first annular boss and a second annular boss from bottom to top, and an annular limiting groove is formed between the first annular boss and the second annular boss; the annular limiting groove and the first arc-shaped portion are fitted together, the first annular boss is located in the first receiving groove, and the second annular boss is located on the side of the first arc-shaped portion away from the first receiving groove; the outer periphery of the suction nozzle is provided with a first protrusion and a second protrusion from bottom to top, and a first limiting groove is formed between the first protrusion and the second protrusion; the second protrusion is located in the first receiving groove, the first protrusion is located in the second receiving groove, and the first limiting groove and the second arc-shaped portion are fitted together.

[0028] Preferably, the height of the second receiving groove is adapted to the height of the first protrusion, that is, the height of the first protrusion is 0.02-0.05 mm smaller than the height of the second receiving groove. This design ensures a tight connection of the first protrusion within the second receiving groove. Similarly, after the first annular boss and the second protrusion are connected to the first receiving groove, the height of the first receiving groove is 0.02-0.05 mm larger than the sum of the dimensions of the first annular boss and the second protrusion.

[0029] In this design, the first annular protrusion of the suction housing and the second protrusion of the suction nozzle are both located in the first receiving groove, so that the suction housing and the suction nozzle can be tightly connected after installation. This achieves the second sealing ring on the outer periphery of the bottom of the suction housing being squeezed and connected inside the suction nozzle, ensuring the sealing effect of both.

[0030] Preferably, the left and right sides of the first and second receiving grooves are planar, and the inner side can be an arc surface, a plane, or other shapes.

[0031] As a specific embodiment, the outer peripheral surfaces of the first annular boss, the second annular boss, and the annular limiting groove are all arc surfaces; the outer peripheral surfaces of the first protrusion and the second protrusion have the same shape, each including multiple planes and multiple arc surfaces, with the arc surfaces and planes arranged alternately, and adjacent planes connected to the arc surfaces.

[0032] It is worth noting that the first and second protrusions include four alternating arc surfaces and four flat surfaces. The arc surface design makes it easier to insert the suction nozzle into the receiving groove of the handle housing, while the flat surface design ensures that the flat surface fits snugly against the side of the receiving groove after insertion, achieving a limiting position and preventing the suction nozzle from shaking. The outer circumference of the first annular boss, the second annular boss, and the annular limiting groove are all arc surfaces, allowing the suction housing to still rotate after installation. This facilitates rotation of the suction housing, adjustment of the position of the suction connector on the suction housing, and easier connection to an external negative pressure source. Beneficial effects

[0033] The elastic button of this utility model is located on the top of the suction housing and is not located inside the suction housing. This will not reduce the cavity size of the suction channel inside the suction housing, thus ensuring the suction volume and suction effect of the waste liquid.

[0034] This invention utilizes the elastic deformation characteristics of the elastic button itself, eliminating the need for additional elastic components, reducing the number of parts in the suction valve assembly, and lowering the assembly difficulty of the suction assembly. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of the suction valve assembly of this utility model in its initial state;

[0036] Figure 2 This is a cross-sectional view of the suction valve assembly of this utility model in the pressed state;

[0037] Figure 3 for Figure 1 A close-up view of the bottom of the middle sealing rod;

[0038] Figure 4 for Figure 2 A close-up view of the bottom of the middle sealing rod;

[0039] Figure 5 for Figure 1 Enlarged views of the top of the sealing rod from different angles;

[0040] Figure 6 for Figure 2 A close-up view of the top of the middle sealing rod;

[0041] Figure 7 This is a schematic diagram of the sealing rod according to an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of the sealing rod according to another embodiment of the present invention;

[0043] Figure 9 This is a cross-sectional view of the elastic button in this utility model;

[0044] Figure 10 This is a schematic diagram of the overall structure of the suction valve assembly of this utility model;

[0045] Figure 11 This is a top view of the sealing rod in this utility model;

[0046] Figure 12 This is a schematic diagram showing the cooperation between the suction housing and the handle housing in this utility model;

[0047] Figure 13 This is a partially enlarged view of the handle housing in this utility model;

[0048] Figure 14 This is a schematic diagram of the suction nozzle in this utility model.

[0049] Among them, 1. Elastic button; 11. Through hole; 12. Top wall; 121. Receiving cavity; 122. Receiving hole; 13. Side wall; 14. Connecting protrusion ring; 2. Sealing rod; 21. Sealing part; 211. First annular groove; 22. Support plate; 23. Fluid channel; 24. Connecting plate; 241. Third annular groove; 25. Top plate; 26. Mounting annular groove; 3. Suction housing; 30. Suction channel; 301. First channel section; 302. Second channel section; 303. Third channel section; 31. First annular groove. 32. Second annular boss; 33. Annular limiting groove; 34. Suction connector; 4. Suction nozzle; 40. Pipe connector; 401. First cavity; 402. Second cavity; 41. First protrusion; 42. Second protrusion; 43. First limiting groove; 5. First sealing ring; 6. Second sealing ring; 7. Third sealing ring; 8. Limiting protrusion; 9. Handle housing; 91. First arc-shaped part; 92. Second arc-shaped part; 93. Third arc-shaped part; 94. Second receiving groove; 95. First receiving groove. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings.

[0051] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] The bottom of this utility model is the lower end in the direction shown in the figure, the top is the upper end in the direction shown in the figure, the lower part is the side near the bottom, and the upper part is the side near the top.

[0054] This utility model provides a suction valve assembly, including a suction nozzle 4, a suction housing 3, a sealing rod 2, and an elastic button 1. The bottom of the suction housing 3 is connected to the suction nozzle 4, and the top is connected to the bottom of the elastic button 1. The suction housing 3 has a suction channel 30 along the axial direction, and a suction connector 34 is provided on the outer wall of the suction housing 3. The suction connector 34 is connected to the suction channel 30. The sealing rod 2 is disposed in the suction channel 30, and the top of the sealing rod 2 is exposed outside the suction channel 30 and connected to the top of the elastic button 1. A through hole 11 is provided on the side wall of the elastic button 1. The elastic button 1 has an initial state and a pressed state. In the initial state, the sealing rod 2 closes the suction channel 30 between the suction connector 34 and the suction nozzle 4, and the suction connector 34 is connected to the through hole 11 through the suction channel 30. In the pressed state, the suction connector 34 and the suction nozzle 4 are connected through the suction channel 30, and the through hole 11 is closed.

[0055] During operation, the elastic button 1 is not pressed and is in its initial, natural state. The sealing rod 2 is in its initial position within the suction channel 30, which connects the suction connector 34 and the elastic button 1. In this state, the through hole 11 is open, allowing the suction connector 34 to communicate with the external atmosphere. However, the suction channel 30 between the suction connector 34 and the suction nozzle 4 is closed by the sealing rod 2, preventing communication between them. Therefore, regardless of whether the external negative pressure source connected to the suction connector 34 is operational, the suction nozzle 4 will not perform negative pressure suction.

[0056] When the elastic button 1 is pressed, it undergoes elastic deformation, compressing the button and closing the through hole 11, thus blocking the connection between the suction connector 34 and the outside air. Simultaneously, pressing the elastic button 1 causes the sealing rod 2 to move downwards, opening the suction channel 30 between the suction connector 34 and the suction nozzle 4. The external negative pressure source then acts on the suction nozzle 4 through the suction connector 34, initiating the suction of waste liquid.

[0057] After releasing the elastic button 1, the elastic button returns to its original shape due to its own elasticity, causing the sealing rod 2 to return to its initial position.

[0058] With the above-mentioned design, this application has the following advantages: the elastic button 1 is placed on the top of the suction housing 3, which avoids occupying the internal space of the suction channel 30, ensuring that the cross-sectional area of ​​the suction channel is maximized and improving the suction flow rate and efficiency.

[0059] The state switching is achieved by utilizing the deformation of the elastic button 1 itself, eliminating the need for springs or other elastic components, reducing the number of parts and assembly complexity, and lowering production costs.

[0060] The working state can be switched by pressing the elastic button 1, which is intuitive to operate; the reset of the elastic button 1 does not require an additional mechanical structure, reducing the number of failure points and ensuring high reliability in long-term use.

[0061] In its initial state, the through hole 11 connects the interior of the elastic button 1 with the outside air, balancing the internal and external pressures of the suction valve assembly. This prevents accidental activation of an external negative pressure source, which could lead to sudden suction operation and improves the safety of the suction valve assembly.

[0062] In this utility model, the through hole 11 is provided on the side wall of the elastic button 1. When the elastic button is in the initial state, the through hole 11 is not squeezed and is in the open state. When the elastic button 1 is in the pressed state, the through hole 11 is squeezed and is in the closed state. Example 1

[0063] like Figures 1 to 7 As shown, this embodiment provides a suction valve assembly, including a suction nozzle 4, a suction housing 3, a sealing rod 2, and an elastic button 1. The suction housing 3 is provided with a suction channel 30 along the axial direction. The bottom of the suction housing 3 is connected to the suction nozzle 4, and the top is connected to the elastic button 1.

[0064] Specifically, such as Figure 3 and Figure 4 As shown, the bottom of the suction housing 3 is inserted into the suction nozzle 4. The suction nozzle 4 includes a first cavity 401 and a second cavity 402 that are connected from top to bottom. The diameter of the outer periphery of the bottom of the suction housing 3 is the same, that is, the bottom of the suction housing 3 is a cylindrical structure. A second sealing ring 6 is connected to the outer periphery of the bottom of the suction housing 3. The outer periphery of the second sealing ring 6 protrudes on the outer side of the outer periphery of the bottom of the suction housing 3.

[0065] The inner diameter of the first cavity 401 is larger than the inner diameter of the second cavity 402, and the connection between the first cavity 401 and the second cavity 402 is a rounded transition. The inner diameter of the second cavity 402 is larger than the outer diameter of the bottom of the suction housing 3, and smaller than the outer diameter of the second sealing ring 6. When the bottom of the suction housing 3 is inserted into the suction nozzle 4, the second sealing ring 6 is stuck at the connection between the first cavity 401 and the second cavity 402, and the second sealing ring 6 is subjected to downward compressive force. By compressing the second sealing ring 6, air leakage is prevented at the connection between the suction housing 3 and the suction nozzle 4, ensuring the sealing effect on the second cavity 402.

[0066] The bottom of the suction nozzle 4 is equipped with a pipe connector 40, which is connected to the second cavity 402. The pipe connector 40 is used to connect to the suction channel of the endoscope insertion part, enabling the transmission of negative pressure and waste fluid. The waste fluid enters the pipe connector 40 through the suction channel of the endoscope insertion part, then enters the suction channel 30 inside the suction housing 3, and finally flows out from the suction connector 34.

[0067] Furthermore, such as Figure 3 and Figure 4 As shown, a limiting protrusion 8 is provided in the second cavity 402 of the suction nozzle 4. When the elastic button 1 is pressed, the bottom of the sealing rod 2 is connected to the limiting protrusion 8. That is, the limiting protrusion 8 can prevent the bottom of the sealing rod 2 from falling too low, causing the pipe joint 40 to become blocked.

[0068] Furthermore, three limiting protrusions 8 are provided, and the three limiting protrusions 8 are evenly distributed in the second cavity 402. The limiting protrusions 8 are plate-shaped structures and are arranged in the vertical direction, that is, along the axial direction of the sealing rod 2. This design will not block the pipe joint 40, nor will it reduce the channel area of ​​the pipe joint 40.

[0069] The top of the suction housing 3 is connected to the elastic button 1, and the elastic button 1 achieves a seal on the top of the suction housing 3. Specifically, the structure of the elastic button 1 is as follows: Figure 9 As shown, the elastic button 1 is integrally injection molded, comprising a top wall 12 and side walls 13 with openings at both ends. The top wall 12 is integrally formed on top of the side walls 13 and seals the top openings of the side walls 13. The side walls 13 also have two through holes 11, and the bottom of the side walls 13 is concave inward to form an annular connecting protrusion 14, as shown. Figure 5 and Figure 6 As shown, the top outer side of the suction housing 3 is provided with a locking groove, and the connecting protrusion 14 is engaged in the locking groove to realize the connection between the elastic button 1 and the suction housing 3.

[0070] The top surface of the top wall 12 of the elastic button 1 is provided with a receiving cavity 121, and the top wall 12 is provided with a receiving hole 122 that passes through the top wall 12 for connecting the sealing rod 2.

[0071] Specifically, a top plate 25 is connected to the top of the sealing rod 2, and a connecting plate 24 is provided on the upper part of the sealing rod 2. The diameter of the top plate 25 is larger than the diameter of the connecting plate 24, and an installation annular groove 26 is formed between the connecting plate 24 and the top plate 25. During installation, the top plate 25 of the sealing rod 2 is located in the receiving cavity 121, and the installation annular groove 26 is located in the receiving hole 122, thereby realizing the connection between the sealing rod 2 and the elastic button 1.

[0072] In this embodiment, the shape of the sealing rod is as follows: Figure 7As shown, 3-5 support plates 22 along the length of the sealing rod 2 are connected to the upper outer periphery of the sealing rod 2. All support plates 22 are the same size, and a fluid channel 23 is formed between adjacent support plates 22. Because the support plates 22 are the same size, the fluid channel 23 is also the same size. The connecting plate 24 is a cylindrical structure, and the bottom surface of the connecting plate 24 is connected to the top surface of the support plate 22. Furthermore, the connecting plate 24 and the support plate 22 are both integrally formed.

[0073] Furthermore, such as Figure 11 As shown, the outer diameter of the connecting plate 24 is the same as the outer diameter of the ring on which the outer side of the support plate 22 is located. The outer sides of multiple support plates 22 are located on the same cylindrical surface, and the diameter of the cylindrical surface on which the outer side of the support plate 22 is located is 0.2-1.2 mm smaller than the inner diameter of the suction channel 30. This design of the support plate 22 can also serve as a guide to prevent the sealing rod 2 from shaking when it moves up and down.

[0074] The lower part of the outer periphery of the connecting plate 24 is provided with a third annular groove 241, and the third sealing ring 7 is embedded in the third annular groove 241. Its circumferential contour extends to the outside of the third annular groove 241. The outer diameter of the connecting plate 24 is smaller than the inner diameter of the suction channel 30, and the outermost diameter of the third sealing ring 7 is larger than the inner diameter of the suction channel 30.

[0075] When the elastic button 1 is in its initial state, that is, in its natural state, the through hole 11 of the elastic button 1 is open, one end of the fluid channel 23 is located inside the elastic button 1, and the other end is located inside the suction channel 30. At this time, the suction channel 30 and the internal cavity of the elastic button 1 are connected, that is, the suction channel 30 and the through hole 11 are connected.

[0076] Press the elastic button 1 to move it to the pressed state. In the pressed state, the through hole 11 closes under the pressure, and the sealing rod 2 moves downward. When the third sealing ring 7 contacts the suction channel 30, the sealing rod 2 cannot move downward further due to the limiting effect of both. At this time, the fluid channel 23 is sealed inside the suction channel 30. Because the through hole 11 is sealed under the pressure, the external gas and the inside of the elastic button 1 are not connected. The suction channel 30 is sealed under the action of the third sealing ring 7, so the suction channel 30 and the inside of the elastic button 1 are not connected. The combined effect of both ensures that the suction channel 30 does not connect with the through hole 11.

[0077] Furthermore, the bottom of the sealing rod 2 is provided with a sealing part 21, and the outer periphery of the sealing part 21 is provided with a first annular groove 211. The first sealing ring 5 is embedded in the first annular groove 211, and its circumferential contour portion extends to the outside of the first annular groove 211.

[0078] The suction channel 30 comprises, from top to bottom, three interconnected channel segments: a first channel segment 301, a second channel segment 302, and a third channel segment 303. The inner diameter of the second channel segment 302 is smaller than that of the first channel segment 301, and the inner diameter of the second channel segment 302 is smaller than that of the third channel segment 303. The outer diameter of the first sealing ring 5 is smaller than that of the third channel segment 303 but larger than that of the second channel segment 302. When the elastic button 1 is in its initial state, the first sealing ring 5 is located at the connection between the third channel segment 303 and the second channel segment 302, achieving a sealed barrier between the third channel segment 303 and the second channel segment 302, thus preventing them from communicating. This design allows the external negative pressure source to operate continuously without causing accidental suction. Example 2

[0079] Example 2 is based on the same inventive concept as Example 1, and the parts that are repeated in Example 1 will not be described again in this example. The difference between this example and Example 1 lies in the structure of the sealing rod 2. In this example, the structure of the sealing rod 2 is as follows: Figure 8 As shown, in this example, the connecting plate 24 of the sealing rod 2 does not have a third annular groove 241, that is, no third sealing ring 7 is provided. This type of sealing rod has a simple structure, and in the pressing state, the suction connector 34 is only connected to the suction nozzle 4 through the closure of the through hole 11. Example 3

[0080] During the manufacturing process, the assembly of the suction valve assembly must consider not only the sealing performance after assembly but also the assembly efficiency. Therefore, how to efficiently assemble the suction valve assembly, how to quickly install the suction valve assembly into the endoscope handle, and how to ensure the sealing performance of the assembled suction valve assembly are also problems that we need to solve.

[0081] This embodiment provides an endoscope handle, such as Figures 10 to 14As shown, the assembly includes a handle housing 9 and a suction valve assembly according to any of the above embodiments. The handle housing 9 has a first arc-shaped portion 91, a second arc-shaped portion 92, and a third arc-shaped portion 93 arranged parallel to each other from the outside to the inside. A first receiving groove 95 is formed between the first arc-shaped portion 91 and the second arc-shaped portion 92, and a second receiving groove 94 is formed between the second arc-shaped portion 92 and the third arc-shaped portion 93. The outer periphery of the suction housing 3 has a first annular boss 31 and a second annular boss 32 arranged from bottom to top. An annular limiting groove 33 is formed between the first annular boss 31 and the second annular boss 32. The annular limiting groove 33 and the first arc-shaped part 91 are fitted together. The first annular boss 31 is located in the first receiving groove 95, and the second annular boss 32 is located on the side of the first arc-shaped part 91 away from the first receiving groove 95. The outer periphery of the suction nozzle 4 is provided with a first protrusion 41 and a second protrusion 42 from bottom to top. The first protrusion 41 and the second protrusion 42 form a first limiting groove 43. The second protrusion 42 is located in the first receiving groove 95, and the first protrusion 41 is located in the second receiving groove 94. The first limiting groove 43 and the second arc-shaped part 92 are fitted together.

[0082] It should be noted that the direction of the handle housing 9 from the outside to the inside is from top to bottom in the diagram.

[0083] Preferably, the left and right sides of the first and second receiving grooves are planar, and the inner sides can be arc surfaces, planar surfaces, or other shaped surfaces. The outer peripheral surfaces of the first annular boss 31, the second annular boss 32, and the annular limiting groove 33 are all arc surfaces; the outer peripheral surfaces of the first protrusion 41 and the second protrusion 42 have the same shape, each including multiple planar surfaces and multiple arc surfaces, with the arc surfaces and planar surfaces arranged alternately, and adjacent planar surfaces connected to the arc surfaces.

[0084] It is worth noting that the first protrusion 41 and the second protrusion 42 include four alternately arranged arc surfaces and four planes, with each pair of arc surfaces symmetrically arranged and each pair of planes symmetrically arranged. During assembly, the suction nozzle needs to be inserted into the receiving groove of the handle housing 9. The arc surface design makes it easier to insert the suction nozzle into the receiving groove of the handle housing. When inserted into the receiving groove of the handle housing 9, the planes of the first protrusion 41 and the second protrusion 42 fit tightly against the left and right side planes of the first and second receiving grooves, thus limiting the suction nozzle and preventing it from shaking.

[0085] The outer circumferential surfaces of the first annular boss, the second annular boss, and the annular limiting groove are all designed with arc surfaces, which allows the suction housing to still rotate after being installed inside the handle housing. This facilitates rotating the suction housing and adjusting the position of the suction connector on the suction housing, making it easier to connect to an external negative pressure source.

[0086] The assembly method of the suction valve assembly provided by this utility model includes the following steps:

[0087] Step 1: Pass the bottom of the sealing rod 2 through the receiving hole 122 of the elastic button 1, so that the top plate 25 of the sealing rod 2 is connected in the receiving cavity 121, and the mounting ring groove 26 is located in the receiving hole 122.

[0088] Specifically, the bottom of the sealing rod 2 is one end where the sealing part 21 is located. Since the diameter of the sealing part 21 at the bottom of the sealing rod 2 is smaller than the diameter of the connecting plate 24, and the diameter of the connecting plate 24 is smaller than the diameter of the top plate 25, it is easier to pass the bottom of the sealing rod 2 through the receiving hole 122 of the elastic button 1. This design allows the top plate 25 to be connected within the receiving cavity 121. Because the diameter of the top plate 25 is larger than the inner diameter of the receiving hole 122, and the diameter of the connecting plate 24 is also larger than the inner diameter of the receiving hole 122, the top plate 25 will not detach from the receiving cavity 121, and the mounting annular groove 26 will not detach from the receiving hole 122.

[0089] Step 2: Install the elastic button 1 on top of the suction housing 3 and place the sealing rod 2 inside the suction channel 30.

[0090] Specifically, the elastic button 1 is engaged with the top of the suction housing 3 via the connecting protrusion 14. The bottom of the sealing rod 2 extends into the suction channel 30.

[0091] Step 3: Press the elastic button 1 to make the sealing part 21 of the sealing rod 2 extend out of the suction housing 3, and install the first sealing ring 5 on the sealing part 21.

[0092] Specifically, pressing the elastic button 1 lowers the sealing rod 2, and the sealing part 21 of the sealing rod 2 extends out of the suction housing 3. At this time, the first sealing ring 5 can be fitted into the first annular groove 211 of the sealing part 21.

[0093] Step 4: Insert the suction housing 3 into the suction nozzle 4.

[0094] Step 5: Insert the first annular protrusion 31 of the suction housing 3 and the second protrusion 42 of the suction nozzle 4 into the first receiving groove 95 of the handle housing 9, and insert the first protrusion 41 of the suction nozzle 4 into the second receiving groove 94.

[0095] In this step, the first annular protrusion 31 of the suction housing 3 and the second protrusion 42 of the suction nozzle 4 need to be simultaneously inserted into the first receiving groove 95 of the handle housing 9. At the same time, the first protrusion 41 of the suction nozzle 4 will also be inserted into the second receiving groove 94.

[0096] It is important to emphasize that the order of the above steps is fixed and cannot be arbitrarily changed. It should be noted that the handle housing 9 is divided into left and right sub-housings. The first arc-shaped portion 91, the second arc-shaped portion 92, the third arc-shaped portion 93, the first receiving groove 95, and the second receiving groove 94 can be disposed on one of the sub-housings, or they can be disposed on both sub-housings. This invention preferably uses the form where they are disposed on only one sub-housing, which reduces the difficulty of aligning the two sub-housings during assembly.

[0097] This assembly method has the following advantages:

[0098] In step one, the bottom of the sealing rod 2 passes through the receiving hole 122 of the elastic button 1, and the top plate 25 is connected inside the receiving cavity 121. This design allows the sealing rod 2 and the elastic button 1 to quickly achieve a preliminary connection. Moreover, since the diameter of the top plate 25 and the connecting plate 24 is larger than the inner diameter of the receiving hole 122, it ensures that the sealing rod 2 is not easily detached from the elastic button 1 after connection.

[0099] In step two, the elastic button 1 is snapped onto the top of the suction housing 3 by the connecting protrusion ring 14. This snapping method is simple to operate and does not require complicated tools or cumbersome fixing steps. Since the elastic button can deform, the two can be quickly assembled.

[0100] In step three, pressing the elastic button 1 causes the sealing part 21 of the sealing rod 2 to extend out of the suction housing and install the first sealing ring. This design prevents the sealing part 21 of the sealing rod 2 from failing to extend out of the suction housing after the first sealing ring 5 is installed first. Furthermore, because the sealing part 21 extends out of the suction housing during the installation of the first sealing ring 5, the accuracy of the sealing ring's installation position is ensured. In use, a seal is achieved through the tight fit between the sealing part 21 and the first sealing ring 5 installed on it, and the suction housing 3.

[0101] In step five, the first annular protrusion of the suction housing and the second protrusion of the suction nozzle are simultaneously engaged into the first receiving groove of the handle housing, and the first protrusion of the suction nozzle is engaged into the second receiving groove. This synchronous engagement design allows for the positioning and fixing of multiple components in one action, avoiding the hassle of installing and adjusting the position of each component individually, greatly shortening the assembly time and improving the overall assembly efficiency.

[0102] Importantly, in this design, the first annular protrusion of the suction housing and the second protrusion of the suction nozzle are both inserted into the first receiving groove of the handle housing. After being inserted, the suction housing and the suction nozzle cannot move up and down. After being inserted, the two fit tightly together and are squeezed together. The sealing effect at the connection between the suction housing and the suction nozzle is ensured by squeezing the second sealing ring 6.

[0103] In this design, the first and second protrusions of the suction nozzle fit tightly against the left and right side planes of the receiving groove. This plane-to-plane fit provides stable radial limiting, reduces the wobbling of the suction nozzle, and thus ensures the sealing of the connection between the suction nozzle and the handle housing. Simultaneously, the outer circumference of the annular limiting groove 33 is designed with a rounded surface, and the connecting surface of the first arc-shaped part 91 is also a rounded surface. This combination ensures the limiting effect while allowing the suction housing to rotate after installation. This facilitates adjustment of the suction connector position on the suction housing, making it easier to connect to an external negative pressure source and increasing the flexibility and adaptability of the endoscope handle during use.

[0104] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A suction valve assembly, characterized in that, It includes a suction nozzle (4), a suction housing (3), a sealing rod (2), and a resilient button (1). The bottom of the suction housing (3) is connected inside the suction nozzle (4), and the top is connected to the bottom of the resilient button (1). The suction housing (3) is provided with a suction channel (30) along the axial direction. The outer wall of the suction housing (3) is provided with a suction connector (34). The suction connector (34) is connected to the suction channel (30). The sealing rod (2) is provided in the suction channel (30). The top of the sealing rod (2) is exposed outside the suction channel (30) and connected to the top of the elastic button (1). The side wall of the elastic button (1) is provided with a through hole (11). The elastic button (1) has an initial state and a pressed state. In the initial state, the sealing rod (2) closes the suction channel (30) between the suction connector (34) and the suction nozzle (4), and the suction connector (34) is connected to the through hole (11) through the suction channel (30). In the pressed state, the suction connector (34) and the suction nozzle (4) are connected through the suction channel (30), and the through hole (11) is closed.

2. The suction valve assembly according to claim 1, characterized in that, The upper outer periphery of the sealing rod (2) is connected to a plurality of support plates (22) along the length of the sealing rod (2), and a fluid channel (23) is formed between two adjacent support plates (22). In the initial state, the through hole (11) of the elastic button (1) is open, one end of the fluid channel (23) is located inside the elastic button (1), and the other end is located inside the suction channel (30); When the elastic button (1) is pressed, the fluid channel (23) is sealed within the suction channel (30).

3. The suction valve assembly according to claim 2, characterized in that, The upper part of the sealing rod (2) is provided with a connecting plate (24), and the bottom surface of the connecting plate (24) is connected to the top surface of the support plate (22); The connecting plate (24) is provided with a third annular groove (241), and a third sealing ring (7) is embedded in the third annular groove (241). Its circumferential contour extends to the outside of the third annular groove (241). The outer diameter of the connecting plate (24) is smaller than the inner diameter of the suction channel (30), and the outermost diameter of the third sealing ring (7) is larger than the inner diameter of the suction channel (30). When the elastic button (1) is pressed, the third sealing ring (7) seals the suction channel (30).

4. The suction valve assembly according to claim 1, characterized in that, The upper outer periphery of the sealing rod (2) is connected to a plurality of support plates (22) along the length of the sealing rod (2), and a fluid channel (23) is formed between two adjacent support plates (22). In the initial state, the through hole (11) of the elastic button (1) is open, one end of the fluid channel (23) is located inside the elastic button (1), and the other end is located inside the suction channel (30).

5. The suction valve assembly according to claim 2 or 4, characterized in that, The support plate (22) and the sealing rod (2) are integrally formed; The multiple support plates (22) are of the same size, and the outer peripheral surfaces of the multiple support plates (22) form an enveloping cylindrical surface. The diameter of the enveloping cylindrical surface is 0.2-1.2 mm smaller than the inner diameter of the attraction channel (30).

6. The suction valve assembly according to claim 1, characterized in that, The suction channel (30) includes, from top to bottom, a first channel segment (301), a second channel segment (302), and a third channel segment (303) connected together. The inner diameter of the second channel segment (302) is smaller than the inner diameter of the first channel segment (301), and the inner diameter of the second channel segment (302) is smaller than the inner diameter of the third channel segment (303). The bottom of the sealing rod (2) is provided with a sealing part (21), and the outer periphery of the sealing part (21) is provided with a first annular groove (211). The first sealing ring (5) is embedded in the first annular groove (211), and its circumferential contour extends to the outside of the first annular groove (211). The outer diameter of the first sealing ring (5) is smaller than the inner diameter of the third channel segment (303) and larger than the inner diameter of the second channel segment (302). When the elastic button (1) is in the initial state, the first sealing ring (5) is located at the connection between the third channel segment (303) and the second channel segment (302).

7. The suction valve assembly according to claim 1, characterized in that, The top of the sealing rod (2) is connected to a top plate (25), and a connecting plate (24) is provided on the upper part of the sealing rod (2). An installation annular groove (26) is formed between the connecting plate (24) and the top plate (25). The elastic button (1) includes a top wall (12) and a side wall (13) with openings at both ends. The top wall (12) is connected to the top of the side wall (13) and seals the top opening of the side wall (13). The top surface of the top wall (12) is provided with a receiving cavity (121), and the top wall (12) is provided with a receiving hole (122) that penetrates the top wall (12). The top plate (25) of the sealing rod (2) is connected to the receiving cavity (121), and the mounting annular groove (26) is located in the receiving hole (122).

8. The suction valve assembly according to claim 1, characterized in that, The suction nozzle (4) includes a first cavity (401) and a second cavity (402) that are connected from top to bottom, and a second sealing ring (6) is connected to the outer periphery of the bottom of the suction housing (3). The inner diameter of the first cavity (401) is greater than the inner diameter of the second cavity (402), the inner diameter of the second cavity (402) is greater than the outer diameter of the bottom of the suction housing (3), and the inner diameter of the second cavity (402) is smaller than the outer diameter of the second sealing ring (6). The second cavity (402) of the suction nozzle (4) is provided with a limiting protrusion (8). When the elastic button (1) is pressed, the bottom of the sealing rod (2) is connected to the limiting protrusion (8).

9. An endoscope handle, characterized in that, Includes a handle housing (9) and a suction valve assembly as described in any one of claims 1-8; The handle housing (9) is provided with a first arc-shaped part (91), a second arc-shaped part (92) and a third arc-shaped part (93) parallel to each other from the outside to the inside. A first receiving groove (95) is formed between the first arc-shaped part (91) and the second arc-shaped part (92), and a second receiving groove (94) is formed between the second arc-shaped part (92) and the third arc-shaped part (93). The outer periphery of the suction housing (3) is provided with a first annular boss (31) and a second annular boss (32) from bottom to top, and an annular limiting groove (33) is formed between the first annular boss (31) and the second annular boss (32); the annular limiting groove (33) and the first arc-shaped part (91) are fitted together, the first annular boss (31) is located in the first receiving groove (95), and the second annular boss (32) is located on the side of the first arc-shaped part (91) away from the first receiving groove (95); The outer periphery of the suction nozzle (4) is provided with a first protrusion (41) and a second protrusion (42) from bottom to top, and a first limiting groove (43) is formed between the first protrusion (41) and the second protrusion (42); the second protrusion (42) is located in the first receiving groove (95), the first protrusion (41) is located in the second receiving groove (94), and the first limiting groove (43) and the second arc-shaped part (92) fit together.

10. The endoscope handle according to claim 9, characterized in that, The outer circumferential surfaces of the first annular boss (31), the second annular boss (32), and the annular limiting groove (33) are all arc surfaces; The outer peripheral surfaces of the first protrusion (41) and the second protrusion (42) have the same shape, each including multiple planes and multiple arc surfaces, with the arc surfaces and planes arranged alternately, and adjacent planes connected to the arc surfaces.

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