A switching mechanism and anesthesia machine

Abstract

This utility model discloses a switching mechanism and an anesthesia machine. The switching mechanism includes a support frame rotating component and a switching valve. The switching valve includes a valve seat and a valve core. Both the support frame and the valve seat are suitable for installation on the main body of the anesthesia machine. The valve seat has a valve cavity inside and also has a first airway, a second airway, and a third airway spaced apart from each other. The first airway, the second airway, and the third airway are all connected to the valve cavity. The rotating component is rotatably connected to the support frame and drives the valve core to switch from a first position to a second position. When the valve core is in the first position, it can temporarily block the second airway. When the rotating component drives the valve core to switch from the first position to the second position, it can release the blockage of the second airway and temporarily block the third airway. This utility model achieves convenient switching between machine-controlled ventilation and manual ventilation by driving the valve core to switch between two positions within the valve seat through the rotating component, effectively reducing the manufacturing cost of the anesthesia machine.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a switching mechanism and an anesthesia machine. Background Technology

[0002] During surgery, anesthesia is typically administered using an anesthesia machine to ensure the procedure proceeds smoothly. Throughout the anesthesia process, the anesthesiologist must switch between manual and machine-controlled ventilation depending on the progress of the surgery and the patient's condition. The ease and reliability of this operation are crucial to surgical safety.

[0003] In existing technologies, the structure for switching between machine-controlled ventilation and manual ventilation in anesthesia machines is often quite complex, resulting in a high overall cost for the anesthesia machine. Utility Model Content

[0004] The technical problem to be solved by this utility model is that, in the prior art, the structure for switching between machine-controlled ventilation and manual ventilation in anesthesia machines is often quite complex, resulting in a high overall cost of the anesthesia machine. This utility model provides a switching mechanism and anesthesia machine.

[0005] To address the aforementioned problems, this utility model provides a switching mechanism, including a support frame, a rotating component, and a switching valve. The switching valve includes a valve seat and a valve core. Both the support frame and the valve seat are suitable for installation on the main body of an anesthesia machine. The valve seat has a valve cavity inside, and the valve seat also has a first air passage, a second air passage and a third air passage spaced apart from each other. The first air passage, the second air passage and the third air passage are all connected to the valve cavity. The rotating component is rotatably connected to the support frame and drives the valve core to switch from a first position to a second position. When the valve core is in the first position, the valve core can temporarily block the second air passage. When the rotating component drives the valve core to switch from the first position to the second position, the valve core can release the blockage of the second air passage and temporarily block the third air passage.

[0006] Optionally, the rotating component includes a first rotating wheel and a second rotating wheel, both of which are rotatably connected to the support frame. The first rotating wheel is provided with a first arc rack, and the outer periphery of the second rotating wheel is sequentially provided with a second arc rack and a cam surface. The first arc rack meshes with the second arc rack, and the valve core is movably connected to the valve seat and abuts against the cam surface.

[0007] Optionally, the switching mechanism further includes an operating element that can be connected to the first rotating wheel. The operating element can drive the first rotating wheel to rotate, thereby driving the second rotating wheel to rotate, so that the second rotating wheel drives the valve core to switch from the first position to the second position via the cam surface.

[0008] Optionally, the operating element is fixedly connected to the first rotating wheel, and both the rotating wheel and the operating element are rotatably connected to the support frame around a first axis. The second rotating wheel is rotatably connected to the support frame around a second axis, and the valve core is slidably connected to the valve seat along a first direction. Wherein, the extension direction of the first axis is parallel to the extension direction of the second axis, and the first direction is perpendicular to the extension direction of the first axis.

[0009] Optionally, the valve core includes a valve stem and a valve plate, the valve stem abuts against the cam surface, the valve plate is sleeved on the outside of the valve stem, and the valve plate is located inside the valve cavity; When the valve core is in the first position, the valve plate can temporarily block the second air passage; when the rotating component drives the valve core to move from the first position to the second position, the valve plate can release the blockage of the second air passage and temporarily block the third air passage.

[0010] Optionally, the switching mechanism further includes a first elastic element connected between the valve stem and the valve seat, the first elastic element having a tendency to drive the valve core to move toward the first position.

[0011] Optionally, the outer periphery of the second rotating wheel is further provided with a protrusion, and the second arc rack, the cam surface and the protrusion are arranged in sequence; the outer edge of the protrusion and the outer edge of the second arc rack both protrude from the cam surface.

[0012] Optionally, the switching mechanism further includes a tactile component, which includes a first tactile element, a second tactile element, and a second elastic element. The first tactile element is connected to the operating element, the second tactile element is movably connected to the support frame along the extension direction of the first axis, and the second elastic element is connected between the second tactile element and the support frame. The second elastic element has a tendency to drive the second tactile element to move toward the first tactile element. The first tactile element has a toothed portion at one end facing the second tactile element, and the second tactile element has a plurality of grooves at one end facing the first tactile element that match the toothed portion, with the plurality of grooves spaced apart from each other.

[0013] Optionally, the second tactile element is provided with a limiting groove, the limiting groove extending through the second tactile element along the extension direction of the first axis, and the support frame is provided with a limiting block that matches the limiting groove, the limiting block being slidably connected to the limiting groove.

[0014] According to the switching mechanism provided in this embodiment, when the valve core is in the first position (mechanical ventilation state), the valve core temporarily blocks the second airway. At this time, the first and third airways remain connected through the valve cavity. Gas from the gas source related to mechanical ventilation is delivered to the patient's breathing circuit through the first and third airways, realizing mechanical ventilation. When the anesthesiologist operates the rotating component to rotate it, the rotating component drives the valve core to switch to the second position (manual ventilation state). The valve core releases the blockage of the second airway and temporarily blocks the third airway. At this time, the first and second airways are connected through the valve cavity. Gas from the manual ventilation device is delivered to the patient's breathing circuit through the first and second airways, completing the switch from mechanical ventilation to manual ventilation. By driving the valve core to switch between two positions within the valve seat through the rotating component, and utilizing the valve core's control over the blocking and opening of different airways, a convenient switch between mechanical and manual ventilation is achieved, effectively reducing the manufacturing cost of the anesthesia machine. Meanwhile, the overall structure consists of only core components such as a support frame, rotating parts, valve seats, and valve cores. Anesthesiologists can quickly switch ventilation modes by rotating the valve. The operation process is simple and intuitive, reducing the risk of operational errors and improving the reliability of the switching process. This provides a safety guarantee for timely adjustment of the ventilation mode according to the patient's condition during surgery. The simple structure also facilitates later maintenance and repair, further improving the stability of the equipment.

[0015] An anesthesia machine provided in this embodiment includes a main body and the aforementioned switching mechanism, wherein the valve seat and the support frame are both mounted on the main body. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-view structural schematic diagram of the switching mechanism provided in one embodiment of the present invention; Figure 2 This is a second-view structural schematic diagram of the switching mechanism provided in one embodiment of the present invention; Figure 3 This is a third-view structural schematic diagram of the switching mechanism provided in one embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the structure cut along line AA; Figure 5 This is a fourth-view structural schematic diagram of the switching mechanism provided in one embodiment of the present invention; Figure 6 for Figure 5 A schematic diagram of the structure cut along line BB; Figure 7 This is a schematic diagram of the switching mechanism provided in one embodiment of the present invention after removing part of the structure; Figure 8 for Figure 7 A magnified view of C; Figure 9 This is a schematic diagram of the switching mechanism provided in another embodiment of the present invention after removing part of the structure.

[0018] The reference numerals in the accompanying drawings are as follows: 1. Support frame; 11. Accommodating hole; 12. Limiting block; 2. Rotating component; 21. First rotating wheel; 22. Second rotating wheel; 23. First circular arc rack; 24. Second circular arc rack; 25. Cam surface; 26. Protrusion; 3. Switching valve; 31. Valve seat; 311. Valve chamber; 312. First air passage; 313. Second air passage; 3131. Manual sub-air passage; 3132. Manual main air passage; 314. Third air passage; 32. Valve core; 321. Valve stem; 322. Valve disc; 4. Operating components; 5. First elastic element; 6. Tactile component; 61. First tactile element; 611. Tooth; 62. Second tactile element; 621. Tooth groove; 622. Limiting groove; 63. Second elastic element. Detailed Implementation

[0019] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] 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.

[0022] like Figures 1 to 9 As shown, an embodiment of the present invention provides a switching mechanism, including a support frame 1, a rotating component 2 and a switching valve 3. The switching valve 3 includes a valve seat 31 and a valve core 32. Both the support frame 1 and the valve seat 31 are suitable for installation on the main body of an anesthesia machine. The valve seat 31 has a valve cavity 311 inside. The valve seat 31 also has a first air passage 312, a second air passage 313 and a third air passage 314 spaced apart from each other. The first air passage 312, the second air passage 313 and the third air passage 314 are all connected to the valve cavity 311. Rotating component 2 is rotatably connected to support frame 1 and drives valve core 32 to switch from a first position to a second position. When valve core 32 is in the first position, it can temporarily block the second airway 313. When rotating component 2 drives valve core 32 to switch from the first position to the second position, valve core 32 can release the blockage of the second airway 313 and temporarily block the third airway 314. In the prior art, the structure for switching between manual ventilation and machine-controlled ventilation in anesthesia machines is usually quite complex. For example, there are multiple nested valve control structures or airway switching mechanisms driven by power components such as pneumatic cylinders and solenoid valves. To achieve precise switching between the two ventilation modes, multiple sets of sealing valve discs are usually required in the airway, and each valve disc needs to correspond to an independent drive component, achieving synchronous opening and closing control through a multi-stage transmission link. This invention utilizes a rotating component 2 to drive a valve core 32 to switch between two positions within a valve seat 31. By selectively blocking and opening the second airway 313 and the third airway 314 through the valve core 32, the conversion between manual and machine-controlled ventilation is achieved. This significantly reduces the number of parts and structural complexity, thereby effectively lowering the manufacturing cost and assembly difficulty of the anesthesia machine. In terms of operation and reliability, the anesthesiologist only needs to rotate the rotating component 2 to switch modes, making the operation intuitive and convenient, reducing the risk of errors associated with complex operations. Simultaneously, the simple mechanical structure reduces potential failure points, improves the stability and reliability of the switching process, and ensures the safety of ventilation mode switching during surgery. Furthermore, the simple structure facilitates later maintenance and repair, reducing equipment maintenance costs.

[0023] like Figure 1 , 4As shown in Figures 5 and 7, in one embodiment, the rotating component 2 includes a first rotating wheel 21 and a second rotating wheel 22, both rotatably connected to the support frame 1. The first rotating wheel 21 is provided with a first arcuate rack 23, and the outer periphery of the second rotating wheel 22 is sequentially provided with a second arcuate rack 24 and a cam surface 25. The first arcuate rack 23 meshes with the second arcuate rack 24. The valve core 32 is movably connected to the valve seat 31 and abuts against the cam surface 25. It is understood that the cam surface 25 is a specially designed curved surface structure on the outer periphery of the second rotating wheel 22. Its shape is not a uniform arc, but rather a specific contour variation is set according to the movement requirements of the valve core 32, such as including inclined surfaces, planes, or arc transition sections with different inclination angles. When the second rotating wheel 22 rotates under the drive of the first rotating wheel 21, the cam surface 25 continuously contacts the valve core 32 as the rotating wheel rotates, and applies a thrust to the valve core 32 or guides its movement through changes in its own contour. Specifically, during operation, when the second rotating wheel 22 rotates, different parts of the cam surface 25 sequentially abut against the valve core 32: when the valve core 32 is in the first position (mechanically controlled ventilation state), the part of the cam surface 25 that contacts the valve core 32 may be a lower plane or a shallow arc surface. At this time, the valve core 32 maintains the blockage of the second air passage 313 under the support of the cam surface 25; as the second rotating wheel 22 rotates, the cam surface 25 gradually pushes the valve core 32 to move through the inclined transition section, so that the valve core 32 gradually releases the blockage of the second air passage 313; when the valve core 32 is rotated to the second position (manual ventilation state), the part of the cam surface 25 that contacts the valve core 32 becomes a higher plane or another arc surface. At this time, the valve core 32 stably maintains the blockage of the third air passage 314 under the action of the cam surface 25. The core advantage of the cam surface 25 design lies in its ability to smoothly convert the rotational motion of the second rotating wheel 22 into the linear or specific trajectory movement of the valve core 32. By precisely controlling the displacement and rhythm of the valve core 32 through a preset contour, it ensures smooth and accurate switching between the two positions, avoiding impacts or jamming during the valve core 32's movement. Simultaneously, it simplifies the conversion structure from rotational motion to linear drive, further enhancing the reliability and stability of the switching mechanism. The rotating component 2 employs a meshing transmission structure between the first rotating wheel 21 and the second rotating wheel 22, further improving the practicality and reliability of the switching mechanism. The first rotating wheel 21 meshes with the second rotating wheel 22's second circular arc rack 24 via the first circular arc rack 23, forming a stable gear transmission relationship. This accurately transmits the force exerted by the anesthesiologist on the rotating wheel to the second rotating wheel 22, ensuring that the cam surface 25 of the second rotating wheel 22 can stably drive the valve core 32 to move. This avoids slippage or jamming during transmission, allowing the valve core 32 to switch more precisely between the first and second positions. This ensures the accuracy of the gas path opening and closing, and reduces the risk of ventilation mode switching errors due to transmission errors.

[0024] like Figure 1, 2 and Figure 4 As shown, in one embodiment, the third airway 314 has a manual main airway 3132 and two manual sub-airways 3131. Both manual sub-airways 3131 are connected to the manual main airway 3132, which is connected to the valve chamber 311. One end of one manual sub-airway 3131, away from the manual main airway 3132, is connected to the safety valve of the anesthesia machine body, and the other end of the other manual sub-airway 3131, away from the manual main airway 3132, is connected to the airbag of the anesthesia machine body. When the valve core 32 blocks the third airway 314, it simultaneously blocks the two manual sub-airways 3131 by blocking the main airway. The second airway 313 includes a machine-controlled main airway and a machine-controlled sub-airway. The machine-controlled main airway connects the valve chamber 311 and the machine-controlled sub-airway, and the end of the machine-controlled sub-airway away from the valve chamber 311 is connected to the bellows of the anesthesia machine body. Valve core 32 blocks the machine control sub-air passage by blocking the main air passage. The design of the second air passage 313 connecting to the ventilation box and the third air passage 314 connecting the safety valve and the airbag precisely adapts to switching between machine control and manual ventilation. In machine control mode, valve core 32 blocks the third air passage 314 and opens the second air passage 313, ensuring a stable air supply to the ventilation box and preventing gas leakage; in manual mode, the second air passage 313 is blocked and the third air passage 314 is opened, allowing the airbag to be squeezed for ventilation. The safety valve simultaneously monitors pressure relief to ensure safety, reduce structural complexity and cost, and the clear division of air passages facilitates later maintenance and troubleshooting.

[0025] like Figure 1-5 and Figure 7 As shown, in one embodiment, the switching mechanism further includes an operating component 4, which can be connected to the first rotating wheel 21. The operating component 4 drives the first rotating wheel 21 to rotate, which in turn drives the second rotating wheel 22 to rotate, causing the second rotating wheel 22 to drive the valve core 32 to switch from the first position to the second position via the cam surface 25. The operating component 4 significantly improves the practicality and adaptability of the switching mechanism. The design of the operating component 4 makes it easier for anesthesiologists to exert force, shortening the ventilation mode switching time, especially in emergency scenarios where efficient switching can be completed, ensuring surgical safety. It is understood that the operating component 4 can be fixedly connected to the first rotating wheel 21 to form a stable integrated structure, with direct and precise force transmission, suitable for frequent switching scenarios, reducing delays. The operating component 4 can also be temporarily connected to the first rotating wheel 21, reducing space occupation in non-operational states, lowering the risk of accidental activation, and providing more flexibility for equipment layout. Meanwhile, after the operating component 4 assumes the direct force-bearing function, the first rotating wheel 21 can focus on the gear meshing accuracy design, which helps to reduce size and processing complexity, indirectly improving gear meshing stability and transmission efficiency, and ensuring the switching reliability of the valve core 32.

[0026] like Figure 4As shown, in one embodiment, the operating element 4 is fixedly connected to the first rotating wheel 21. Both the rotating wheel and the operating element 4 are rotatably connected to the support frame 1 around a first axis. The second rotating wheel 22 is rotatably connected to the support frame 1 around a second axis. The valve core 32 is slidably connected to the valve seat 31 along a first direction. The extension direction of the first axis is parallel to the extension direction of the second axis, and the first direction is perpendicular to the extension direction of the first axis. In this embodiment, the first direction is... Figure 4 In the X-direction, the extension directions of the first axis and the second axis are as follows: Figure 4 The front-to-back direction is considered. In this embodiment, the parallel first and second axes allow for more precise gear meshing, reducing transmission errors and ensuring efficient and direct force transmission. The coaxial rotation of the operating component 4 and the rotating wheel conforms to operating habits and reduces resistance; the sliding direction of the valve core 32 is perpendicular to the axis, efficiently converting the cam drive force into linear thrust, resulting in smoother switching. The design of parallel axes and perpendicular sliding direction allows for a compact arrangement of components, reducing space occupation, simplifying assembly, and improving equipment reliability.

[0027] like Figure 1 and Figure 4 As shown, in one embodiment, the valve core 32 includes a valve stem 321 and a valve plate 322. The valve stem 321 abuts against the cam surface 25, and the valve plate 322 is sleeved on the outside of the valve stem 321 and located inside the valve cavity 311. When the valve core 32 is in the first position, the valve plate 322 can temporarily block the second air passage 313; when the rotating component 2 drives the valve core 32 to move from the first position to the second position, the valve plate 322 can release the blockage of the second air passage 313 and temporarily block the third air passage 314. The valve core 32 adopts a separate structure of valve stem 321 and valve plate 322, and the clear division of functions improves the overall reliability. The valve stem 321 focuses on abutting against the cam surface 25 to transmit driving force, and can use high-strength materials to ensure transmission stability; the valve plate 322 is sleeved outside the valve stem 321 and located in the valve cavity 311 to directly participate in the air passage blocking, and can be made of materials with better sealing performance (such as elastic materials) to ensure the blocking effect of the second and third air passages 314 and reduce the risk of gas leakage. The separate design makes it easy to select suitable materials for different functional requirements and reduces the limitations caused by the performance limitations of a single material. Meanwhile, the split structure allows the valve plate 322 to be replaced individually after wear, without the need to replace the entire valve core 32, thus reducing maintenance costs; the assembly method of the valve stem 321 and the valve plate 322 also simplifies the processing technology, improves production efficiency, and further ensures the accuracy and safety of ventilation mode switching.

[0028] like Figure 4As shown, in one embodiment, the switching mechanism further includes a first elastic element 5, which is connected between the valve stem 321 and the valve seat 31. The first elastic element 5 has a tendency to drive the valve core 32 to move towards the first position. The first elastic element 5, connected between the valve stem 321 and the valve seat 31, and having a tendency to drive the valve core 32 to move towards the first position (mechanical ventilation), brings multiple advantages. The elastic force of the first elastic element 5 allows the valve core 32 to remain stably in the mechanical ventilation position without external force operation, avoiding unexpected mode switching due to vibration, accidental touch, or other accidents, ensuring the continuity and safety of mechanical ventilation in routine surgery. When switching to manual ventilation is required, the anesthesiologist only needs to overcome the elastic force to drive the valve core 32 to move; the operational force feedback is clear, facilitating the perception of the switching status. After releasing the operating element 4, the elastic element can automatically drive the valve core 32 back to the mechanical ventilation position, simplifying the reset operation. Especially in emergency situations, it can quickly restore the default ventilation mode, reducing the risk of operational errors.

[0029] like Figure 1 and Figure 4 As shown, in one embodiment, a protrusion 26 is also provided on the outer periphery of the second rotating wheel 22, and the second arc rack 24, cam surface 25, and protrusion 26 are arranged sequentially; the outer edges of the protrusion 26 and the outer edges of the second arc rack 24 both protrude from the cam surface 25. It can be understood that the core of "the outer edges of the protrusion 26 and the outer edges of the second arc rack 24 both protrude from the cam surface 25" is that they must at least protrude from the area of ​​the directly adjacent cam surface 25. Neither needs to be forcibly protruding from the highest position of the cam surface 25, but rather the goal is to achieve limiting and protective functions. Specifically, for the second arc rack 24, its outer edge needs to protrude from the starting section of the adjacent cam surface 25 to ensure sufficient tooth tip height when meshing with the first arc rack 23, avoiding excessive meshing clearance that could lead to transmission failure. Simultaneously, the adjacent flange can naturally form a lateral limiting effect on the valve core 32 or surrounding components, preventing components from shifting into the meshing area and causing interference. For the protrusion 26, its outer edge must protrude beyond the end section of the adjacent cam surface 25, forming a complete limiting space through the height difference with the outer edge of the second arc rack 24. Even if the cam surface 25 has a local protrusion 26 outline (such as the peak section of the valve core 32 switching), as long as the outer edge of the protrusion 26 is higher than the transition area of ​​the adjacent cam surface 25, it can effectively prevent the valve core 32 from sliding excessively. At the same time, it forms a physical shield for the easily worn end section of the cam surface 25, ensuring the core functions of limiting and protection while avoiding structural redundancy caused by excessive protrusion 26, thus balancing functionality and economy. The sequential arrangement of the protrusion 26 on the outer periphery of the second rotating wheel 22, the second arc rack 24, and the cam surface 25 has significant advantages. The outer edges of both the protrusion 26 and the second arc rack 24 protrude beyond the cam surface 25, forming a natural limiting space between them. This can limit the excessive displacement of the valve core 32 or surrounding components, preventing the valve core 32 from exceeding the preset stroke due to excessive operation, ensuring the accuracy of air circuit switching, and reducing the risk of mechanical collision.

[0030] like Figure 1 and Figure 4 As shown, in one embodiment, the protrusion 26, the second arc-shaped rack 24, and the second rotating wheel 22 are integrally formed. This integral design improves structural stability and reliability, avoids loose connections and clearance issues associated with separate assembly, ensures gear meshing accuracy and valve core 32 switching precision, and reduces the risk of jamming or misalignment. Furthermore, the integral design eliminates the need for separate assembly in production, reducing assembly difficulty and labor costs, minimizing assembly quality issues, and improving batch production efficiency and consistency. It also eliminates stress concentration, enhances resistance to deformation, extends service life, reduces maintenance costs, and supports long-term stable operation of the equipment.

[0031] like Figures 7-9 As shown, in one embodiment, the switching mechanism further includes a tactile component 6, which includes a first tactile element 61, a second tactile element 62, and a second elastic element 63. The first tactile element 61 is connected to the operating element 4, the second tactile element 62 is movably connected to the support frame 1 along the extension direction of the first axis, and the second elastic element 63 is connected between the second tactile element 62 and the support frame 1. The second elastic element 63 has a tendency to drive the second tactile element 62 to move toward the first tactile element 61. The first tactile component 61 has teeth 611 at its end facing the second tactile component 62, and the second tactile component 62 has multiple grooves 621 at its end facing the first tactile component 61, which match the teeth 611. The grooves 621 are spaced apart from each other. The tactile component 6, through the cooperation of the first tactile component 61, the second tactile component 62, and the second elastic component 63, provides clear operational feedback for switching ventilation modes, significantly improving the tactile experience. When the anesthesiologist rotates the operating component 4, the teeth 611 of the first tactile component 61 rotates with the operating component 4, engaging and disengaging with the grooves 621 of the second tactile component 62. Driven by the second elastic component 63, the second tactile component 62 always maintains a tendency to move towards the first tactile component 61, making the engagement between the teeth 611 and the grooves 621 tight and elastically buffered. A noticeable "sticking" or "segmentation" is produced every certain angle of rotation. This allows anesthesiologists to accurately determine the switching position of valve core 32 through tactile sensing without visual confirmation, clearly identifying whether mechanical or manual ventilation is in operation. This is especially beneficial during surgery when the surgeon's focus is on the patient or other equipment, enabling rapid mode switching and reducing the risk of operational errors. Simultaneously, the elastically driven engagement structure provides a smoother and more comfortable operating experience, avoiding the harshness caused by hard contact, reducing hand fatigue during prolonged operation, and further enhancing the ease of use and reliability of the switching mechanism.

[0032] like Figure 7-9As shown, in one embodiment, a limiting groove 622 is provided on the second tactile component 62, extending through the second tactile component 62 along the first axis. A limiting block 12 matching the limiting groove 622 is provided on the support frame 1, and the limiting block 12 is slidably connected to the limiting groove 622. The limiting groove 622 on the second tactile component 62 and the limiting block 12 on the support frame 1 slide in cooperation, providing precise guidance for the movement of the second tactile component 62 and significantly improving the working stability of the tactile component 6. The limiting groove 622 extends through the second tactile component 62 along the first axis, forming a constraint structure with the matching limiting block 12, ensuring that the second tactile component 62 can only reciprocate along the first axis, preventing it from shifting, tilting, or rotating under the drive of the second elastic member 63 or the meshing action with the first tactile component 61. This ensures precise engagement between the teeth 611 of the first tactile element 61 and the grooves 621 of the second tactile element 62, preventing tactile feedback disturbances (such as unclear stuck sensations or misaligned segments) caused by positional deviations of the second tactile element 62. This ensures that the anesthesiologist can stably perceive operational feedback and accurately judge the ventilation mode switching status. Simultaneously, the sliding engagement between the limiting groove 622 and the limiting block 12 reduces frictional resistance during the movement of the second tactile element 62, preventing additional wear between components due to shaking, extending the service life of the tactile assembly 6, and further improving the overall reliability of the switching mechanism.

[0033] like Figure 9 As shown, in one embodiment, the support frame 1 is provided with a receiving hole 11, a limiting block 12 is disposed on the inner wall of the receiving hole 11, and a second tactile element 62 is disposed in the receiving hole 11. The receiving hole 11 on the support frame 1 provides installation space for the second tactile element 62, and embedding it inside makes the structure more compact and reduces the space occupied inside the anesthesia machine. The limiting block 12 on the inner wall of the receiving hole 11 cooperates with the second tactile element 62 to achieve the guiding and limiting function while avoiding damage caused by the exposed limiting structure.

[0034] According to the switching mechanism provided in this embodiment of the present invention, when the valve core 32 is in the first position (mechanical ventilation state), the valve core 32 temporarily blocks the second airway 313. At this time, the first airway 312 and the third airway 314 are connected through the valve cavity 311. The gas from the gas source related to mechanical ventilation is delivered to the patient's breathing circuit through the first airway 312 and the third airway 314 to realize mechanical ventilation. When the anesthesiologist operates the rotating component 2 to rotate it, the rotating component 2 drives the valve core 32 to switch to the second position (manual ventilation state). The valve core 32 releases the blockage of the second airway 313 and temporarily blocks the third airway 314. At this time, the first airway 312 and the second airway 313 are connected through the valve cavity 311. The gas from the manual ventilation device is delivered to the patient's breathing circuit through the first airway 312 and the second airway 313 to complete the switch from mechanical ventilation to manual ventilation. The valve core 32 is switched between two positions within the valve seat 31 by the rotating component 2. The valve core 32 controls the blocking and opening of different airways, enabling convenient switching between machine-controlled and manual ventilation, effectively reducing the manufacturing cost of the anesthesia machine. Furthermore, the overall structure consists only of core components such as the support frame 1, rotating component 2, valve seat 31, and valve core 32. Anesthesiologists can quickly switch ventilation modes by rotating the valve core 32, making the operation simple and intuitive, reducing the risk of operational errors, and improving the reliability of the switching process. This provides a safety guarantee for timely adjustment of the ventilation mode according to the patient's condition during surgery. The simple structure also facilitates later maintenance and repair, further enhancing the stability of the equipment.

[0035] In addition, this utility model embodiment provides an anesthesia machine, including a main body and the switching mechanism of the above embodiment, with valve seat 31 and support frame 1 both mounted on the main body. By integrating the above-mentioned switching mechanism, the simplified switching mechanism of this utility model significantly reduces the number of parts, eliminates the complex multi-component linkage structure of the prior art, reduces processing and assembly costs, and significantly lowers the overall manufacturing cost of the anesthesia machine, providing medical institutions with a more economical option.

[0036] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A switching mechanism, characterized by It includes a support frame, a rotating component, and a switching valve. The switching valve includes a valve seat and a valve core. Both the support frame and the valve seat are suitable for installation on the main body of an anesthesia machine. The valve seat has a valve cavity inside, and the valve seat also has a first air passage, a second air passage and a third air passage spaced apart from each other. The first air passage, the second air passage and the third air passage are all connected to the valve cavity. The rotating component is rotatably connected to the support frame and drives the valve core to switch from a first position to a second position. When the valve core is in the first position, the valve core can temporarily block the second air passage. When the rotating component drives the valve core to switch from the first position to the second position, the valve core can release the blockage of the second air passage and temporarily block the third air passage.

2. The switching mechanism of claim 1, wherein, The rotating component includes a first rotating wheel and a second rotating wheel, both of which are rotatably connected to the support frame. The first rotating wheel is provided with a first arc rack, and the outer periphery of the second rotating wheel is provided with a second arc rack and a cam surface in sequence. The first arc rack meshes with the second arc rack, and the valve core is movably connected to the valve seat and abuts against the cam surface.

3. The switching mechanism of claim 2, wherein, The switching mechanism further includes an operating component that can be connected to the first rotating wheel. The operating component can drive the first rotating wheel to rotate, thereby driving the second rotating wheel to rotate, so that the second rotating wheel drives the valve core to switch from the first position to the second position through the cam surface.

4. The switching mechanism of claim 3, wherein, The operating component is fixedly connected to the first rotating wheel. Both the rotating wheel and the operating component are rotatably connected to the support frame around a first axis. The second rotating wheel is rotatably connected to the support frame around a second axis. The valve core is slidably connected to the valve seat along a first direction. Wherein, the extension direction of the first axis is parallel to the extension direction of the second axis, and the first direction is perpendicular to the extension direction of the first axis.

5. The switching mechanism of claim 2, wherein, The valve core includes a valve stem and a valve plate. The valve stem abuts against the cam surface, and the valve plate is sleeved on the outside of the valve stem and located inside the valve cavity. When the valve core is in the first position, the valve plate can temporarily block the second air passage; when the rotating component drives the valve core to move from the first position to the second position, the valve plate can release the blockage of the second air passage and temporarily block the third air passage.

6. The switching mechanism of claim 5, wherein, The switching mechanism further includes a first elastic element connected between the valve stem and the valve seat, the first elastic element having a tendency to drive the valve core to move toward the first position.

7. The switching mechanism of claim 2, wherein, The second rotating wheel is also provided with a protrusion on its outer periphery, and the second arc rack, the cam surface and the protrusion are arranged in sequence; the outer edge of the protrusion and the outer edge of the second arc rack both protrude from the cam surface.

8. The switching mechanism according to claim 4, characterized in that, The switching mechanism further includes a tactile component, which includes a first tactile element, a second tactile element, and a second elastic element. The first tactile element is connected to the operating element. The second tactile element is movably connected to the support frame along the extension direction of the first axis. The second elastic element is connected between the second tactile element and the support frame, and the second elastic element has a tendency to drive the second tactile element to move toward the first tactile element. The first tactile element has a toothed portion at one end facing the second tactile element, and the second tactile element has a plurality of grooves at one end facing the first tactile element that match the toothed portion, with the plurality of grooves spaced apart from each other.

9. The switching mechanism of claim 8, wherein, The second tactile component is provided with a limiting groove, which extends through the second tactile component along the extension direction of the first axis. The support frame is provided with a limiting block that matches the limiting groove, and the limiting block is slidably connected to the limiting groove.

10. An anaesthesia machine characterised in that, The device includes a main body and a switching mechanism as described in any one of claims 1-9, wherein the valve seat and the support frame are both mounted on the main body.

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