A manual machine control switch, airway switching device and anaesthesia machine

Abstract

The embodiment of the application provides a manual machine control switch, an airway switching device and an anesthesia machine, and relates to the technical field of medical instruments. The manual machine control switch comprises a base, a rotating mechanism, an executing mechanism and an elastic abutting mechanism. The rotating mechanism has a first state and a second state. The rotating mechanism can act on the executing mechanism and drive the executing mechanism to move along the base. The elastic abutting mechanism is used for providing a first elastic force to the rotating mechanism to maintain the rotating mechanism in the first state and providing a second elastic force to the rotating mechanism to maintain the rotating mechanism in the second state. The embodiment of the application can ensure that the airway switching device accurately switches the required air path channel, thereby ensuring the normal use of the anesthesia machine.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a manual control switch, an airway switching device, and an anesthesia machine. Background Technology

[0002] Anesthesia machines are typically equipped with airway switching devices to allow switching between different airway channels, adapting to both machine-controlled and manual operation modes.

[0003] Related technologies typically achieve the switching between two operating modes through a manual mechanical switch in the airway switching device. The stability of the manual mechanical switch has a significant impact on the normal use of the anesthesia machine. Currently, due to its structural design, the manual mechanical switch is difficult to maintain stable operation, making the switching of the airway channels in the airway switching device prone to malfunction, thus affecting the normal use of the anesthesia machine. Summary of the Invention

[0004] This application provides a manual control switch, an airway switching device, and an anesthesia machine, which can ensure that the airway switching device accurately switches to the required airway, thereby ensuring the normal use of the anesthesia machine.

[0005] In a first aspect, embodiments of this application provide a manual mechanical control switch, including:

[0006] Base;

[0007] A rotating mechanism is rotatably mounted on a base, and the rotating mechanism has a first state and a second state;

[0008] The actuator moves in coordination with the base. When the rotating mechanism switches between the first and second states, the rotating mechanism can act on the actuator and drive the actuator to move along the base.

[0009] And an elastic abutment mechanism, which provides a first elastic force to the rotating mechanism to maintain it in the first state when the rotating mechanism is in the first state, and provides a second elastic force to the rotating mechanism to maintain it in the second state when the rotating mechanism is in the second state.

[0010] According to the manual control switch described in the first aspect, by setting a rotating mechanism on the base that can switch between a first state and a second state, and by having the rotating mechanism act on an actuator that moves in coordination with the base during the switching process, and driving the actuator to move along the base, while using an elastic abutment mechanism to provide corresponding elastic forces when the rotating mechanism is in the first state and the second state respectively, the rotating mechanism can be stably maintained in both working states, and drive the actuator to achieve accurate displacement action during switching, thereby improving the stability of the working state of the manual control switch, ensuring that the airway switching device accurately switches to the required airway channel, thereby ensuring the normal use of the anesthesia machine.

[0011] In one possible embodiment, the rotating mechanism has a first slide, and the elastic abutment mechanism is adapted to slide on the first slide. When the rotating mechanism switches between a first state and a second state, the elastic abutment mechanism slides from one end of the first slide to the other end of the first slide.

[0012] In one possible embodiment, the rotating mechanism also has an intermediate state between the first state and the second state. When the rotating mechanism is in the intermediate state, the elastic abutment mechanism is used to provide a third elastic force to the rotating mechanism, the third elastic force being greater than the first elastic force and the second elastic force.

[0013] In one possible embodiment, the elastic abutment mechanism includes a telescopic sliding assembly and an elastic element. The telescopic sliding assembly is rotatably configured, capable of telescopic extension and retraction, and one end of the telescopic sliding assembly is adapted to slide onto a first slide rail. The elastic element is used to drive the telescopic sliding assembly to extend and retract.

[0014] In one possible embodiment, the telescopic sliding assembly includes a telescopic assembly and a first roller disposed at the end of the telescopic assembly, the first roller being adapted to slide on a first slide rail, and an elastic element being sleeved on the outer periphery of the telescopic assembly.

[0015] In one possible embodiment, the telescopic assembly includes a first sleeve and a second sleeve, the second sleeve being movably disposed within the first sleeve, an elastic element abutting between the first sleeve and the first sleeve, and a first roller connected to the second sleeve.

[0016] In one possible embodiment, the telescopic sliding assembly further includes a first rotating shaft disposed at the end of the telescopic assembly, a first roller connected to the first rotating shaft, a rotating mechanism forming strip grooves on both sides of the first slide, and the first rotating shaft being adapted to move and engage in the strip grooves.

[0017] In one possible embodiment, the resilient abutment mechanism further includes a fixed mounting base on which the telescopic sliding assembly is rotatably mounted.

[0018] In one possible embodiment, the first slide rail includes at least one of a plane, a concave surface, and a convex surface.

[0019] In one possible embodiment, a second rotating shaft is provided on the base, and a rotating mechanism is connected to the second rotating shaft.

[0020] In one possible embodiment, the rotating mechanism has a second slide, and the actuator is adapted to slide on the second slide. When the rotating mechanism switches between a first state and a second state, the actuator slides from one end of the second slide to the other end of the second slide.

[0021] In one possible embodiment, the actuator includes a push rod and a second roller rotatably disposed at one end of the push rod, the push rod being movably engaged on the base, and the second roller being adapted to slidably engage on a second slide rail.

[0022] In one possible embodiment, the rotating mechanism includes a rotating base and a handle connected to the rotating base, the handle having an outwardly extending operating portion.

[0023] In one possible embodiment, the manual control switch further includes a protective connecting cover connected to the base. The protective connecting cover has a connecting structure along its circumference that is suitable for mounting onto the body of the anesthesia machine. The protective connecting cover has a control slot, and the operating part extends out of the control slot and can rotate along the control slot.

[0024] In one possible embodiment, the manual mechanical switch further includes a first displacement detection mechanism for detecting the position of the actuator.

[0025] In one possible embodiment, the first displacement detection mechanism includes a blocking member and a photoelectric switch. The photoelectric switch has a transmitter and a receiver disposed opposite to each other. The blocking member is connected to the actuator and can move with the actuator. The blocking member can move between the transmitter and the receiver to trigger a first signal.

[0026] In one possible embodiment, the first displacement detection mechanism further includes a photoelectric switch holder connected to the base. The photoelectric switch holder has a detection channel adapted to the movement of the blocking member. The photoelectric switch holder also has a receiving cavity for accommodating the photoelectric switch. The receiving cavity has a first opening and a second opening communicating with the detection channel. The transmitting end is exposed from the first opening, and the receiving end is exposed from the second opening.

[0027] In one possible embodiment, the manual mechanical switch further includes a second displacement detection mechanism for detecting the position of the rotating mechanism.

[0028] In one possible embodiment, the rotating mechanism is provided with a protrusion, and the second displacement detection mechanism includes a micro switch, which can be activated by the protrusion when the rotating mechanism switches between a first state and a second state.

[0029] Secondly, embodiments of this application provide an airway switching device, comprising:

[0030] The housing has a first air passage and a second air passage;

[0031] The valve stem assembly is movably mounted within the housing;

[0032] And including the manual mechanical control switch provided above, the actuator in the manual mechanical control switch can act on the valve stem assembly and drive the valve stem assembly to move, so as to realize the switching of the first air passage and the second air passage.

[0033] In one possible embodiment, the housing has a first cavity, a second cavity, and a third cavity arranged sequentially along the axial direction of the valve stem assembly. A first communication port is provided between the first cavity and the second cavity, and a second communication port is provided between the second cavity and the third cavity. The valve stem assembly includes a valve stem and a first sealing member sleeved on the valve stem. The valve stem passes through the first cavity, the second cavity, and the third cavity. When the valve stem assembly moves, the first sealing member has a first sealing position that seals the first communication port and a second sealing position that seals the second communication port. When the first sealing member is in the first sealing position, the second cavity and the third cavity communicate to form a first air passage. When the first sealing member is in the second sealing position, the second cavity and the first cavity communicate to form a second air passage.

[0034] In one possible embodiment, the valve stem assembly further includes a second seal sleeved on the valve stem, the second seal being spaced apart from the first seal along the axial direction of the valve stem, the second seal being disposed near the end of the valve stem, the second seal including an inner edge, an outer edge, and an arched portion connecting the inner edge and the outer edge, the inner edge being adapted to be sleeved on the valve stem.

[0035] Thirdly, embodiments of this application provide an anesthesia machine, including a machine body and an airway switching device disposed on the machine body. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] Figure 1 A partial structural schematic diagram of an anesthesia machine provided according to an embodiment of this application is shown;

[0038] Figure 2This diagram illustrates a schematic of an anesthesia machine in machine-controlled mode according to an embodiment of this application.

[0039] Figure 3 This diagram illustrates a schematic of an anesthesia machine in manual mode according to an embodiment of this application.

[0040] Figure 4 A schematic diagram of a manual mechanical control switch according to an embodiment of this application is shown;

[0041] Figure 5 This diagram illustrates a structure for removing the protective cover of a manual mechanical switch according to an embodiment of this application.

[0042] Figure 6 A partial structural schematic diagram of a rotating mechanism provided according to an embodiment of this application is shown;

[0043] Figure 7 A partial structural schematic diagram of a rotating mechanism provided according to an embodiment of this application is shown at another angle.

[0044] Figure 8 A schematic diagram of a manual mechanical switch removal base and part of the rotation mechanism according to an embodiment of this application is shown;

[0045] Figure 9 A schematic diagram of the structure of a base provided according to an embodiment of this application is shown;

[0046] Figure 10 This illustration shows a structural schematic diagram of a manual mechanical switch for removing a photoelectric switch holder according to an embodiment of this application;

[0047] Figure 11 A schematic diagram of a photoelectric switch holder according to an embodiment of this application is shown;

[0048] Figure 12 This shows a schematic diagram of the structure of a photoelectric switch holder from another angle according to an embodiment of this application;

[0049] Figure 13 A schematic diagram of another angle of a manual mechanical switch removal base and part of the rotation mechanism provided according to an embodiment of this application is shown.

[0050] Figure label:

[0051] 100 - Base; 101 - Moving channel; 110 - Second rotating shaft;

[0052] 200 - Rotating mechanism; 201 - First slide rail; 202 - Strip groove; 203 - Second slide rail; 210 - Rotating seat; 220 - Handle; 230 - Protrusion; 221 - Operating part;

[0053] 300 - Actuator; 310 - Push rod; 320 - Second roller;

[0054] 400 - Elastic abutment mechanism; 410 - Telescopic sliding assembly; 420 - Elastic element; 430 - Fixed mounting base; 411 - Telescopic assembly; 412 - First roller; 413 - First pivot; 411a - First sleeve rod; 411b - Second sleeve rod;

[0055] 500 - Protective connection cover; 510 - Connection structure; 520 - Control slot;

[0056] 600-First displacement detection mechanism; 610-Shielding component; 620-Photoelectric switch; 630-Photoelectric switch base; 621-Transmitter; 622-Receiver; 631-Detection channel; 632-First opening; 633-Second opening; 631a-Receiving cavity;

[0057] 700 - Second displacement detection mechanism; 710 - Micro switch;

[0058] 10-Fuselage;

[0059] 20 - Airway switching device; 21 - Housing; 22 - Valve stem assembly; 23 - Manual mechanical control switch; 21a - First cavity; 21b - Second cavity; 21c - Third cavity; 21d - First connecting port; 21e - Second connecting port; 22a - Valve stem; 22b - First seal; 22c - Second seal; 22c1 - Inner edge; 22c2 - Outer edge; 22c3 - Arched portion; 211 - First air passage; 212 - Second air passage.

[0060] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] One of the important functions of anesthesia machines is to replace or assist patients in achieving smooth breathing during anesthesia (especially general anesthesia), ensuring the patient's oxygen supply and carbon dioxide removal, and maintaining stable vital signs.

[0063] Anesthesia machines typically have two operating modes: machine-controlled and manual. In machine-controlled mode, the anesthesia machine can automatically input oxygen and automatically expel carbon dioxide. In this mode, the anesthesia machine can automatically input oxygen and automatically expel carbon dioxide through its internal control system and oxygen supply system. In manual mode, oxygen can be manually input and carbon dioxide can be assisted in expelling. In this mode, medical personnel can supply oxygen or assist in expelling carbon dioxide by squeezing the reservoir.

[0064] It should be understood that in both of the above-mentioned operating modes, the airway switching device in the anesthesia machine can switch between different airway channels, one of which connects to the oxygen supply system and the other to the reservoir bag. The airway switching device can adapt to both the machine-controlled and manual modes of the anesthesia machine by switching between different airway channels.

[0065] The relevant technology usually achieves the switching between two working modes through a manual control switch in the airway switching device. The working stability of the manual control switch has an important impact on the normal use of the anesthesia machine.

[0066] Specifically, the airway switching device is equipped with a valve stem. A manual mechanical switch can move the valve stem to different positions based on its state, thereby enabling the airway switching device to switch between different airway channels. Understandably, the stability of the manual mechanical switch's state directly affects the valve stem position, thus influencing the switching of airway channels.

[0067] Currently, manual control switches can typically switch between two states, one state corresponding to one airway and the other state corresponding to another airway. In other words, the two states can correspond to the two working modes of the anesthesia machine mentioned above.

[0068] The aforementioned manual control switches typically lack a maintenance mechanism to keep them in their current or desired state. Based on the existing design of the manual control switches, it is difficult for them to maintain the stability of their working state. The switching of the airway channels in the airway switching device is prone to failure, thus affecting the normal use of the anesthesia machine.

[0069] Based on the above situation and problems, this application provides a manual control switch that can maintain its working state in the current position, thereby improving the stability of the working state of the manual control switch and ensuring that the airway switching device accurately switches to the required airway channel, thus ensuring the normal use of the anesthesia machine.

[0070] Specifically, the manual mechanical control switch is equipped with a base, a rotating mechanism, an actuator, and a resilient abutment mechanism. The rotating mechanism is rotatably mounted on the base. By rotating the rotating mechanism, the working state of the manual mechanical control switch can be switched. Through the structural cooperation between the rotating mechanism and the actuator, the rotating mechanism can drive the actuator to perform telescopic movement during rotation, thereby allowing the actuator to act on the valve stem to complete the switching of the air passage. The resilient abutment mechanism can provide a holding force to the rotating mechanism, which can maintain the manual mechanical control switch in its current working state.

[0071] Based on the aforementioned manual control switch, this application embodiment also provides an airway switching device, which can achieve precise switching of airway channels.

[0072] Based on the above-mentioned airway switching device, this application embodiment also provides an anesthesia machine with excellent performance stability.

[0073] Figure 1 A partial structural schematic diagram of an anesthesia machine provided according to an embodiment of this application is shown; Figure 2 This diagram illustrates a schematic of an anesthesia machine in machine-controlled mode according to an embodiment of this application. Figure 3 A schematic diagram of an anesthesia machine in manual mode according to an embodiment of this application is shown.

[0074] In the embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 3 The anesthesia machine includes a body 10 and an airway switching device 20 installed on the body 10.

[0075] The anesthesia machine integrates an airway switching device 20 on the body 10. The airway switching device 20 includes the aforementioned manual control switch 23, which enables precise switching between machine-controlled and manual modes.

[0076] Please continue to refer to this. Figure 2 and Figure 3The airway switching device 20 includes a housing 21, a valve stem assembly 22, and a manual control switch 23. A first airway channel 211 and a second airway channel 212 are formed inside the housing 21. The valve stem assembly 22 is movably disposed in the housing 21 and is used to change the connection state of the first airway channel 211 and the second airway channel 212. The manual control switch 23 is disposed corresponding to the valve stem assembly 22, and the actuator 300 of the manual control switch 23 can act on the valve stem assembly 22 and drive the valve stem assembly 22 to move, so as to realize the switching of the first airway channel 211 and the second airway channel 212.

[0077] The housing 21 is the main structure used to support and define the gas passage. Its main function is to provide a closed or semi-closed fluid containment space for the first gas passage 211 and the second gas passage 212, and to provide installation and guiding references for the operation of the valve stem assembly 22 and the manual mechanical control switch 23, thereby enabling the gas passage switching process to have stable mechanical and sealing boundaries.

[0078] The housing 21 may be part of the body 10, or the housing 21 may be connected to the body 10 by a subsequent connection process. For example, the housing 21 may be fixedly connected to the body 10 by screws, clips, welding, mounting or flange connection.

[0079] The shell 21 can be made of metal, engineering plastic or metal and plastic composite. For example, the shell 21 can be made of aluminum alloy, stainless steel or high-strength polycarbonate to take into account structural strength, corrosion resistance, processing convenience and lightweight requirements.

[0080] The valve stem assembly 22 is a switching actuator that is movably disposed in the housing 21. Its function is to reciprocate in a predetermined direction within the housing 21 and change the connection state of the first air passage 211 and the second air passage 212 through its own displacement, thereby converting the external switching command into the switching action of the internal air passage.

[0081] The valve stem assembly 22 is usually in a sliding guide fit with the housing 21. The valve stem assembly 22 can move linearly along the axial direction, or it can reciprocate with a limited stroke under the constraint of the guide structure.

[0082] The manual control switch 23 is the control structure in the airway switching device 20. The actuator 300 in the manual control switch 23 can act on the valve stem assembly 22, thereby realizing the switching of the first airway channel 211 and the second airway channel 212.

[0083] The manual control switch 23 can be installed on the outside of the housing 21. The manual control switch 23 can be connected to the housing 21 or the body 10. Generally speaking, it is necessary to ensure that the manual control switch 23 is in an easy-to-operate position.

[0084] The airway switching device 20 provided in this application embodiment allows the operator to control the manual control switch 23 during operation. The manual control switch 23 can switch to the required state and maintain the stability of the state based on the synergistic effect of the base 100, the rotating mechanism 200, the actuator 300 and the elastic abutment mechanism 400. This improves the stability of the working state of the manual control switch 23 and ensures that the airway switching device 20 accurately switches to the required airway channel, thereby ensuring the normal use of the anesthesia machine.

[0085] In some embodiments, please refer to Figure 2 and Figure 3 The housing 21 has a first cavity 21a, a second cavity 21b, and a third cavity 21c arranged sequentially along the axial direction of the valve stem assembly 22. A first communication port 21d is provided between the first cavity 21a and the second cavity 21b, and a second communication port 21e is provided between the second cavity 21b and the third cavity 21c. The valve stem assembly 22 includes a valve stem 22a and a first sealing member 22b sleeved on the valve stem 22a. The valve stem 22a passes through the first cavity 21a and the second cavity 21b. In the third cavity 21c, when the valve stem assembly 22 moves, the first seal 22b has a first sealing position that seals the first communication port 21d and a second sealing position that seals the second communication port 21e. When the first seal 22b is in the first sealing position, the second cavity 21b communicates with the third cavity 21c to form a first air passage 211. When the first seal 22b is in the second sealing position, the second cavity 21b communicates with the first cavity 21a to form a second air passage 212.

[0086] The first cavity 21a, the second cavity 21b, and the third cavity 21c are continuous accommodating spaces formed by separating the interior of the housing 21 along the axial direction of the valve stem 22a. The second cavity 21b is located in the middle and serves as a gas exchange chamber. The first cavity 21a and the third cavity 21c are located on both sides of the second cavity 21b and are connected to the oxygen supply system or the gas storage bag. The first connection port 21d and the second connection port 21e are respectively provided on the partition wall between adjacent cavities to achieve selective communication between cavities when the valve stem assembly 22 moves axially.

[0087] The first sealing element 22b is an annular sealing element sleeved on the valve stem 22a, used to achieve sealing cooperation with different communication ports when the valve stem 22a is in different axial positions.

[0088] For example, the first seal 22b can be one of an O-ring, a lip seal, or an integrated elastic sealing sleeve. The first seal 22b can be made of silicone rubber, fluororubber, medical-grade polyurethane, or other materials with good elastic recovery and airtightness to meet the requirements of sealing reliability, durability, and cleanability in medical devices.

[0089] The valve stem 22a can be a metal stem, a metal stem with a plastic coating, or a high-strength composite material stem. Its surface can be polished, plated, or treated with low friction to reduce the frictional resistance between it and the first seal 22b and improve the smoothness of reciprocating motion.

[0090] Based on the above structure, the first seal 22b moves synchronously along the axial direction during the movement of the valve stem assembly 22, and completes the switching seal between the first communication port 21d and the second communication port 21e. Please refer to [reference needed]. Figure 2 When the first seal 22b is in the first sealed position, the first connecting port 21d is closed while the second cavity 21b and the third cavity 21c remain connected, thus forming the first airway channel 211. At this time, the anesthesia machine is in machine-controlled mode. Please refer to [link / reference]. Figure 3 When the first seal 22b is in the second sealing position, the second connecting port 21e is closed while the second cavity 21b remains connected to the first cavity 21a, thereby forming the second airway channel 212. At this time, the anesthesia machine is in manual mode.

[0091] It should be noted that, in order to meet the requirements of different flow and pressure levels, the interference between the first seal 22b and the inner wall of the housing 21 is usually set to a range that can form a stable seal without significantly increasing the resistance to movement. For example, it can be 0.05 mm to 0.3 mm. The axial travel of the valve stem 22a should at least cover the effective distance required for the first seal 22b to switch from one connection port to another, and allow for an appropriate sealing compression margin.

[0092] In addition, the first connecting port 21d and the second connecting port 21e can be designed as a round hole, an oblong hole, an annular opening or a window opening. Their size can be selected according to the gas flow rate, pressure drop and response speed, usually so that the effective flow area of ​​the two connecting ports before and after being switched can meet the target ventilation requirements.

[0093] In some embodiments, please refer to Figure 2 and Figure 3The valve stem assembly 22 further includes a second seal 22c sleeved on the valve stem 22a. The second seal 22c and the first seal 22b are spaced apart along the axial direction of the valve stem 22a. The second seal 22c is located near the end of the valve stem 22a. The second seal 22c includes an inner edge 22c1, an outer edge 22c2, and an arched portion 22c3 connecting the inner edge 22c1 and the outer edge 22c2. The inner edge 22c1 is adapted to be sleeved on the valve stem 22a.

[0094] The second seal 22c is an elastic sealing element located near the end of the valve stem 22a and used in conjunction with the first seal 22b to achieve sealing compensation and contact buffering. Its main function is to improve sealing reliability during the movement of the valve stem 22a and the switching of the air circuit, and to compensate for the axial displacement error, installation tolerance, and slight wobble of the valve stem 22a during operation, thereby reducing the risk of leakage and enhancing the contact stability of the sealing surface.

[0095] The second seal 22c is arranged at intervals from the first seal 22b along the axial direction of the valve stem 22a. The second seal 22c and the first seal 22b correspond to different sealing areas during the movement of the valve stem 22a, enabling the valve stem assembly 22 to form a multi-level sealing cooperation relationship at different positions. Specifically, the second seal 22c is positioned near the end of the valve stem 22a, forming a seal between the valve stem 22a and the edge of the housing 21.

[0096] The inner edge 22c1 is the inner annular boundary of the second seal 22c, which is used to fit around the outer periphery of the valve stem 22a and form an elastic covering fit with the valve stem 22a. The outer edge 22c2 is the outer periphery of the second seal 22c, which is used to form contact with the corresponding sealing surface or cavity boundary in the housing 21 when the valve stem 22a moves axially. The arched part 22c3 is a raised transition structure connecting the inner edge 22c1 and the outer edge 22c2. It can undergo elastic deformation when compressed to provide continuous rebound force and contact pressure, so that the sealing surface maintains a relatively stable fit under different working conditions.

[0097] In some specific embodiments, the arched portion 22c3 disposed between the inner edge 22c1 and the outer edge 22c2 can be one, two, or more, depending on the outer peripheral space of the valve stem 22a and the sealing requirements. Furthermore, the arching direction of the arched portion 22c3 is not limited.

[0098] In some specific embodiments, the arched portion 22c3 can be configured as a raised structure, a recessed structure, or a wave structure.

[0099] For example, the second seal 22c may be made of silicone rubber, fluororubber, nitrile rubber, thermoplastic elastomer or medical-grade elastomer material to meet the requirements of airtightness, cleanliness and durability in the air circuit of anesthesia machine.

[0100] Figure 4 A schematic diagram of a manual mechanical switch 23 according to an embodiment of this application is shown; Figure 5 A schematic diagram of a manual mechanical switch 23 removing the protective connecting cover 500 according to an embodiment of this application is shown.

[0101] In the embodiments of this application, please refer to Figure 4 and Figure 5 The manual mechanical control switch 23 includes a base 100, a rotating mechanism 200, an actuator 300, and an elastic abutment mechanism 400. The base 100 serves as the mounting support for the entire switch. The rotating mechanism 200 is rotatably mounted on the base 100 and has a first state and a second state. The actuator 300 moves in cooperation with the base 100. When the rotating mechanism 200 switches between the first state and the second state, the rotating mechanism 200 can act on the actuator 300 and drive the rotating mechanism 200 to move along the base 100. The elastic abutment mechanism 400 cooperates with the rotating mechanism 200 to provide corresponding elastic forces in different states, thereby enabling the rotating mechanism 200 to switch between and maintain two working states.

[0102] The base 100 refers to the mounting base used to support the rotating mechanism 200, the actuator 300 and the elastic abutment mechanism 400. Its function is to provide a relatively fixed assembly reference for each component and to stably install the manual control switch 23 on the body 10 of the anesthesia machine or the aforementioned housing 21.

[0103] The base 100 can be a metal bracket, an engineering plastic base, or a composite material support. Specifically, it can be made of aluminum alloy, stainless steel, POM (Polyoxymethylene), PA (Polyamide 66) with fiber reinforcement, or other materials with sufficient rigidity and dimensional stability.

[0104] The rotating mechanism 200 refers to the operation input component that is rotatably mounted on the base 100. Its function is to receive the operator's manual rotation operation and, when switching between the first state and the second state, convert the angular displacement into a driving force on the actuator 300 to realize the switching control between manual mode and machine control mode.

[0105] The rotating mechanism 200 can be rotatably connected to the base 100 via a rotating shaft, eccentric wheel, cam surface, swing arm, or rotating disk structure. An operating part 221 that is easy for manual gripping can be provided on its exterior. The operating part 221 can be a knob, lever, or crank. An internal mating structure that cooperates with the actuator 300 is formed. The mating structure can be the second slide 203 in the following embodiment, etc. When the rotating mechanism 200 switches from the first state to the second state, the mating structure can generate a displacement change relative to the actuator 300 and drive the actuator 300 to move.

[0106] The actuator 300 is a transmission actuator that moves and cooperates with the base 100 and is displaced under the action of the rotating mechanism 200. Its function is to receive the mechanical action output by the rotating mechanism 200 and further transmit the action to the valve stem assembly 22 in the anesthesia machine so as to drive the valve stem assembly 22 to complete the position change.

[0107] The actuator 300 can move along a specified route in the base 100. For example, a movement channel 101 can be provided in the base 100 (see reference). Figure 9 )wait.

[0108] The elastic abutment mechanism 400 refers to an elastic locking or abutment component that cooperates with the rotating mechanism 200 and / or the base 100 to provide a holding force to the rotating mechanism 200. Its function is to provide a first elastic force to maintain the rotating mechanism 200 when it is in a first state, and to provide a second elastic force to maintain the rotating mechanism 200 when it is in a second state, thereby forming a bistable holding effect and preventing the rotating mechanism 200 from swinging back in the transition range or when it is disturbed by external factors.

[0109] The elastic abutment mechanism 400 can be disposed on the periphery of the rotating mechanism 200. When the rotating mechanism 200 rotates to the target angle, the elastic abutment mechanism 400 can stably position the rotating mechanism 200 by means of spring preload, torsion spring rebound, spring sheet pressing, or magnetic adsorption. In the following embodiments, the elastic abutment mechanism 400 will be mainly described using the spring preload method as an example.

[0110] The manual / mechanical control switch 23 provided in this embodiment allows the operator to drive a rotating mechanism 200 to rotate around a base 100. During the switching process from a first state to a second state, the actuator 300 displaces along a preset guide path on the base 100 and transmits this displacement to the valve stem assembly 22 in the airway switching device 20, thereby switching out the required airway to achieve the purpose of switching from manual mode to mechanical control mode or vice versa. During the switching process, the elastic abutment mechanism 400 continuously provides elastic restoring force during the movement of the rotating mechanism 200 and provides a corresponding elastic force after the rotating mechanism 200 reaches the target angle, so that the rotating mechanism 200 is stably stationed in the first or second state, preventing it from deviating from the target position due to vibration, rebound, or external disturbance after the switching is completed. Because the rotation of the rotating mechanism 200, the linear displacement of the actuator 300, and the dual-state maintenance function of the elastic contact mechanism 400 form a coordinated linkage, the rotational motion can be accurately converted into the effective stroke of the actuator, and at the same time, a reliable lock can be formed at the switching endpoint, so that the pneumatic control components can obtain clear, stable and repeatable motion input.

[0111] Therefore, it can be understood that the manual control switch 23 in this embodiment of the application provides a rotating mechanism 200 on the base 100 that can switch between a first state and a second state. During the switching process, the rotating mechanism 200 acts on the actuator 300 that moves in coordination with the base 100 and drives the actuator 300 to move along the base 100. At the same time, the elastic abutment mechanism 400 provides corresponding elastic forces when the rotating mechanism 200 is in the first state and the second state, respectively. This enables the rotating mechanism 200 to be stably maintained in both working states and drives the actuator 300 to achieve accurate displacement during switching. This improves the stability of the working state of the manual control switch 23 and ensures that the airway switching device 20 accurately switches to the required airway, thereby ensuring the normal use of the anesthesia machine.

[0112] Figure 6 A partial structural schematic diagram of a rotating mechanism 200 provided according to an embodiment of this application is shown; Figure 7 A partial structural schematic diagram of a rotating mechanism 200 provided according to an embodiment of this application is shown at another angle.

[0113] In some embodiments, please refer to Figures 4 to 7 The rotating mechanism 200 has a first slide 201, and the elastic abutment mechanism 400 is adapted to slide and engage on the first slide 201. When the rotating mechanism 200 switches between a first state and a second state, the elastic abutment mechanism 400 slides from one end of the first slide 201 to the other end of the first slide 201.

[0114] The first slide rail 201 provides a defined guide path for the elastic abutment mechanism 400. Essentially, it is a continuous or nearly continuous motion trajectory formed on the rotating mechanism 200, used to constrain the elastic abutment mechanism 400 from displacement along a predetermined direction during the rotation of the rotating mechanism 200. The function of the first slide rail 201 is that, when the rotating mechanism 200 rotates from the first state to the second state, the elastic abutment mechanism 400 does not simply make localized pressing contact with the rotating mechanism 200, but rather gradually slides along the contour of the first slide rail 201. This allows the elastic force to continuously act on the rotating mechanism 200 during the switching process, thereby improving the smoothness and state maintenance capability of the rotating mechanism 200 during the transition between the two states.

[0115] The first slide rail 201 is preferably disposed on the outer peripheral surface, inner peripheral surface or partial end surface of the rotating mechanism 200, and forms a cooperative relationship with the elastic abutment mechanism 400. The sliding end of the elastic abutment mechanism 400 can always maintain contact with the first slide rail 201 through the action of elastic pre-tightening force.

[0116] The first slide 201 can be at least one of a plane, a concave surface, or a convex surface.

[0117] In some specific embodiments, the surface of the first slide 201 may be made of a metal-machined surface, an injection-molded surface, a sprayed wear-resistant surface, or an embedded wear-resistant sheet to reduce wear caused by long-term reciprocating sliding.

[0118] The sliding end of the elastic abutment mechanism 400 can be a roller or ball structure to achieve rolling engagement or low-friction sliding engagement between the elastic abutment mechanism 400 and the first slide rail 201.

[0119] When the manual control switch 23 is in normal working condition, the rotating mechanism 200 is in either the first or second state. At this time, the sliding end of the elastic abutment mechanism 400 abuts against one end of the first slide rail 201 and applies a corresponding elastic force to the rotating mechanism 200, thus maintaining the state. When the operator applies an external force to push the rotating mechanism 200 to rotate, the rotating mechanism 200 causes the first slide rail 201 to shift relative to the elastic abutment mechanism 400. The elastic abutment mechanism 400 slides along the first slide rail 201 from one end to the other. When the rotating mechanism 200 rotates to another state, the elastic abutment mechanism 400 is located at the other end of the first slide rail 201 and re-establishes a stable abutment, so that the rotating mechanism 200 can reliably stay at the target position.

[0120] Based on the above action process, it can be seen that by the relative movement between the first slide 201 and the elastic abutment mechanism 400, the angular displacement during the rotation process is converted into the path change of the elastic abutment mechanism 400 along the trajectory. This not only makes the switching process smoother, but also provides a more balanced holding force throughout the entire stroke range, and can maintain the stability of the rotating mechanism 200 in the first and second states, thereby improving the switching accuracy of the anesthesia machine between machine-controlled mode and manual mode.

[0121] In some embodiments, the rotating mechanism 200 also has an intermediate state between the first state and the second state. When the rotating mechanism 200 is in the intermediate state, the elastic abutment mechanism 400 is used to provide a third elastic force to the rotating mechanism 200. The third elastic force is greater than the first elastic force and the second elastic force.

[0122] The elastic abutment mechanism 400 is a mechanical component that can apply an elastic preload to the rotating mechanism 200 and generate different forces at different relative positions. Its purpose is to enable the rotating mechanism 200 to remain stably in the working state at both ends, and to enable the rotating mechanism 200 in the middle state to spontaneously switch to the first state or the second state.

[0123] The elastic abutment mechanism 400 moves along the slide and obtains a greater amount of compression, tension or bending deformation in the middle position to form a third elastic force.

[0124] It should be understood that the intermediate state makes it easier for the rotating mechanism 200 to switch between the first and second states, while also ensuring the stability of the rotating mechanism 200 in its current position. For example, when switching from the first state to the second state, the elastic abutment mechanism 400 needs to slide from one end of the first slide rail 201 to the other. During the sliding process, the elastic force increases from the first state to the intermediate state, requiring the elastic abutment mechanism 400 to exceed the position corresponding to the intermediate state before switching back to the first state. If it does not exceed the position corresponding to the intermediate state, the elastic abutment mechanism 400 will return to the first state under the action of a greater elastic force.

[0125] In some embodiments, please refer to Figure 4 , Figure 5 and Figure 6 The elastic abutment mechanism 400 includes a telescopic sliding assembly 410 and an elastic element 420. The telescopic sliding assembly 410 is rotatably configured, and the telescopic sliding assembly 410 is capable of telescopic extension and retraction. One end of the telescopic sliding assembly 410 is adapted to slide and engage on the first slide rail 201. The elastic element 420 is used to drive the telescopic sliding assembly 410 to extend and retract.

[0126] The telescopic sliding assembly 410 is a mechanical assembly that combines rotational guidance, telescopic compensation and sliding contact functions. It is used to change its own length or relative position when the rotating mechanism 200 undergoes angular displacement, and to stably transmit the elastic abutment to the rotating mechanism 200 through the cooperation of its end with the first slide rail 201.

[0127] In this application, the telescopic sliding component 410 can be understood as an active structure that cooperates with the base 100. One end of the telescopic sliding component 410 forms a sliding end that contacts the first slide rail 201. In addition, the telescopic sliding component 410 can also rotate, so that when the sliding end moves along the first slide, the movement of the telescopic sliding component 410 on the first slide rail 201 can be adapted by the rotation and telescopic properties.

[0128] The elastic element 420 is an elastic element used to provide restoring force and drive the telescopic sliding assembly 410 to produce displacement changes. Its function is to apply a continuous preload to the telescopic sliding assembly 410 so that the telescopic sliding assembly 410 can automatically extend or retract when the position of the rotating mechanism 200 changes, thereby maintaining the sliding end in an effective contact state with the first slide rail 201.

[0129] The elastic element 420 can be structurally disposed inside, outside or in the adjacent mounting cavity of the telescopic sliding assembly 410, and forms a force transmission relationship with the telescopic sliding assembly 410 by end abutment, sleeve, hook or insertion, so that it outputs a stable elastic restoring force under compression, tension or torsion.

[0130] This application does not limit the specific type of the elastic element 420. For example, the elastic element 420 can be a compression spring, a tension spring, a torsion spring, or an elastic rubber element. It can also be further selected as a silicone element, a rubber column, a polyurethane elastic element 420, a gas spring, or a magnetic elastic unit depending on the assembly space.

[0131] When the operator drives the rotating mechanism 200 to rotate from the first state to the second state, the telescopic sliding assembly 410 begins to slide under the guidance of the first slide rail 201. The elastic element 420 is gradually compressed, stretched, or twisted with the displacement of the telescopic sliding assembly 410, and continuously outputs restoring force during this process, so that the sliding end always presses against the inner wall or guide surface of the first slide rail 201, avoiding the interruption of the contact relationship. As the rotating mechanism 200 continues to rotate, the constraint direction of the first slide rail 201 on the telescopic sliding assembly 410 changes. The telescopic sliding assembly 410 adjusts its own posture under the combined action of rotation and telescopic, converting the force provided by the elastic element 420 into a stable resisting force on the rotating mechanism 200, thereby forming a holding force of different magnitudes when the rotating mechanism 200 approaches the first state, the second state, or the equilibrium position between the two.

[0132] Based on the above analysis, it can be seen that through the coordinated cooperation of the telescopic sliding component 410 and the elastic element 420, the rotating mechanism 200 can achieve continuous elastic support and dynamic maintenance in different states. This not only helps to reduce mechanical shock and error accumulation during the switching process, but also enables it to maintain a relatively stable state recognition capability under operating room vibration, frequent operation and long-term use conditions, thereby improving the working stability and clinical safety of the anesthesia machine manual control switch 23.

[0133] In some embodiments, please refer to Figures 4 to 8 The telescopic sliding assembly 410 includes a telescopic assembly 411 and a first roller 412 disposed at the end of the telescopic assembly 411. The first roller 412 is adapted to slide on the first slide rail 201, and the elastic element 420 is sleeved on the outer periphery of the telescopic assembly 411.

[0134] The telescopic sliding assembly 410 is used to form a telescopic transmission unit in the elastic abutment mechanism 400. The telescopic assembly 411 is a mechanical assembly that can generate relative displacement along its own axis. The first roller 412 is a guide member that is disposed at the end of the telescopic assembly 411 and is used to form rolling contact with the first slide rail 201. The elastic member 420 is an elastic pre-tightening member that is sleeved on the outer periphery of the telescopic assembly 411 and applies a restoring force to the telescopic assembly 411.

[0135] The first roller 412 is located at the end of the telescopic assembly 411 facing the first slide rail 201, and directly contacts the surface of the first slide rail 201 when the rotating mechanism 200 rotates. The telescopic assembly 411 can be axially compressed or elongated relative to the end where the roller is located. The elastic element 420 is sleeved on the outer periphery of the telescopic assembly 411, and is usually located between the telescopic assembly 411 and its adjacent limiting end, mounting seat or connecting end, so as to form a pre-compression state along the telescopic direction, so that the roller is always pushed towards the first slide rail 201 and maintains stable contact.

[0136] By cooperating with the telescopic component 411 and the first roller 412, the elastic abutment mechanism 400 can achieve low-friction guidance through the first roller 412 when it moves along the first slide 201 with the rotating mechanism 200. With the help of the sleeved elastic element 420, it can continuously provide a stable rebound force during the telescopic component 411's extension and retraction, thereby ensuring that the elastic abutment mechanism 400 maintains a smoother abutment against the rotating mechanism 200 and has a more sensitive switching response.

[0137] In one exemplary implementation, the first roller 412 can be a cylindrical roller, a disc roller, a ball roller, or a roller with bearings, and the material can be stainless steel, engineering plastic, ceramic, or oil-impregnated nylon to balance wear resistance, low friction, and corrosion resistance.

[0138] The telescopic assembly 411 can be made of metal rod, plastic rod or composite rod, specifically a solid rod, hollow rod, stepped rod or rod with guide groove.

[0139] Based on the aforementioned telescopic sliding assembly 410, when the manual control switch 23 switches states, the rotating mechanism 200 drives the elastic abutment mechanism 400, which cooperates with it, to move along the first slide rail 201. The first roller 412 first forms rolling contact with the first slide rail 201 and rotates smoothly within the slide rail. The roller significantly reduces sliding friction and local wear, enabling the telescopic sliding assembly 410 to complete displacement with a smaller driving force. At the same time, the elastic element 420 sleeved on the outer periphery of the telescopic assembly 411 undergoes elastic deformation as the telescopic assembly 411 elongates and compresses. During the switching process, it continuously applies a restoring force to the telescopic assembly 411, and this restoring force is stably transmitted to the first slide rail 201 and the rotating mechanism 200 via the first roller 412. This ensures that the rotating mechanism 200 has clear elastic constraints and stable contact support when approaching the first state, the second state, or the intermediate equilibrium position. Therefore, the elastic abutment mechanism 400 is less prone to jamming, deviation or swinging during the switching process, and can more reliably maintain the rotating mechanism 200 in the predetermined state. At the same time, it has better following and positioning when the state changes, thereby improving the switching stability, durability and consistency of the manual control switch 23 in the gas circuit control of the anesthesia machine.

[0140] In some embodiments, please refer to Figure 8 The telescopic assembly 411 includes a first sleeve rod 411a and a second sleeve rod 411b. The second sleeve rod 411b is movably disposed in the first sleeve rod 411a. An elastic element 420 abuts between the first sleeve rod 411a and the first sleeve rod 411b. A first roller 412 is connected to the second sleeve rod 411b.

[0141] The first sleeve 411a and the second sleeve 411b constitute a sleeve-type telescopic assembly 411, wherein the first sleeve 411a can serve as an outer guide sleeve or outer sleeve, the second sleeve 411b can serve as an inner sleeve that reciprocates axially within it, the elastic element 420 is disposed between the first sleeve 411a and the second sleeve 411b and is in a compressed state, and the first roller 412 is fixedly connected to the end of the second sleeve 411b for forming a rolling engagement with the first slide rail 201.

[0142] The function of the first sleeve rod 411a is to provide axial guidance and radial limiting for the second sleeve rod 411b, ensuring stable movement of the second sleeve rod 411b when it extends or retracts under force. The function of the second sleeve rod 411b is to support the first roller 412 and transmit the restoring force generated by the elastic element 420 to the first roller 412 to adapt to changes in the position of the first slide rail 201. The function of the elastic element 420 is to provide continuous axial preload and restoring force during extension and retraction, thereby ensuring that the first roller 412 always remains in contact with the first slide rail 201. The function of the first roller 412 is to transform the relative motion between the second sleeve rod 411b and the first slide rail 201 from sliding friction to rolling friction, thereby reducing resistance and wear.

[0143] It is understandable that the first sleeve rod 411a and the second sleeve rod 411b can be arranged coaxially in structure. The second sleeve rod 411b is inserted into the first sleeve rod 411a and moves axially along the first sleeve rod 411a. A guide surface, a limiting step, or a fitting clearance can be provided between the two to ensure smooth and reliable telescopic movement. The elastic element 420 can be arranged between the bottom of the inner cavity of the first sleeve rod 411a and the end of the second sleeve rod 411b, or arranged in the space around the outer periphery of the second sleeve rod 411b, so that it has a certain initial compression after assembly. The roller can be installed at the end of the second sleeve rod 411b by means of a pin, a rotating shaft, a snap-fit, or a threaded connection, so that it moves synchronously with the second sleeve rod 411b and can rotate around its own axis.

[0144] In addition, the first rod 411a and the second rod 411b can be in the form of a round tube, a square tube or an irregularly shaped rod, or they can be rods with guide ribs or guide grooves. The materials can be stainless steel, aluminum alloy, copper alloy, polyoxymethylene, nylon or glass fiber reinforced plastic.

[0145] During operation, when the rotating mechanism 200 is in different states and displaces along the first slide rail 201, the first roller 412 first contacts the surface of the first slide rail 201 and rolls forward under the action of the guide contour. The reaction force borne by the first roller 412 is transmitted to the elastic element 420 through the second sleeve rod 411b, causing the elastic element 420 to compress or release accordingly, and pushing the second sleeve rod 411b to extend or retract relative to the first sleeve rod 411a. At the same time, the first sleeve rod 411a provides stable guidance for the second sleeve rod 411b, limiting its yaw and radial movement during axial movement, so that the roller can always closely follow the contour changes of the first slide rail 201. As the first slide rail 201 transitions from one end to the other, the telescopic displacement of the second sleeve rod 411b corresponds to the rotation position of the rotating mechanism 200. The elastic element 420 forms differentiated restoring forces at different positions, so that the roller remains stably attached near the first state, the second state, and the intermediate transition state, avoiding detachment, jamming, or position drift due to vibration, operational disturbance, or rebound.

[0146] In some specific embodiments, the telescopic sliding assembly 410 further includes a first rotating shaft 413 disposed at the end of the telescopic assembly 411, a first roller 412 connected to the first rotating shaft 413, and a strip groove 202 formed on both sides of the first slide rail 201 by the rotating mechanism 200, wherein the first rotating shaft 413 is adapted to move and engage in the strip groove 202.

[0147] The first rotating shaft 413 is an axial connecting member used to support the first roller 412 and make it rotate relative to the telescopic component 411. Its main function is to combine the rotational support of the first roller 412 with the guiding constraint of the telescopic sliding component 410, so that the first roller 412 can maintain a stable posture and move along a predetermined path when driven by the rotating mechanism 200 in the first slide 201.

[0148] The first rotating shaft 413 can be disposed at the end of the telescopic assembly 411 and pass through or connect to the center of the first roller 412. The first roller 412 can be installed on the first rotating shaft 413 by means of bearing sleeve, interference fit or pin fit to ensure that the rolling resistance is small and that radial sway is not easy to occur. The strip grooves 202 formed on both sides of the first slide rail 201 by the rotating mechanism 200 provide double-sided limiting and guiding for the first rotating shaft 413, so that the first rotating shaft 413 can slide smoothly along the length direction of the strip grooves 202 during the rotation of the rotating mechanism 200, thereby avoiding the first roller 412 from swaying, dislodging or jamming when subjected to force.

[0149] In some specific embodiments, the first rotating shaft 413 may be in the form of a cylindrical pin, a stepped shaft, or a hollow shaft. The material may be stainless steel to improve corrosion resistance and wear resistance, or carbon steel with surface hardening treatment, or engineering plastics to reduce friction and noise.

[0150] In some specific embodiments, the strip groove 202 can be a straight groove, an arc groove, or an elongated hole groove with rounded corners. The groove wall can also be improved by polishing, spraying a wear-resistant layer, or embedding wear-resistant liners to improve sliding performance.

[0151] During the state switching process of the manual control switch 23, the operator drives the rotating mechanism 200 to rotate relative to the base 100. Under the guidance of the first slide rail 201, the rotating mechanism 200 drives the first roller 412 and its connected first rotating shaft 413 to move. Since the first rotating shaft 413 is confined within the strip grooves 202 on both sides of the rotating mechanism 200, the first rotating shaft 413 can only move along the predetermined trajectory of the strip grooves 202 and cannot be laterally offset, thus keeping the first roller 412 in a stable guided state. As the rotating mechanism 200 transitions from the first state to the second state, the first rotating shaft 413 gradually slides within the strip grooves 202, cooperating with the first roller 412 moving along the first slide rail 201. The telescopic sliding component 410 synchronously completes its telescopic adjustment under the action of the elastic element 420, thereby stably transmitting the rotational action of the rotating mechanism 200 to the actuator 300, ultimately achieving precise switching of the air passage.

[0152] In the above process, since the strip groove 202 forms a double constraint on the first rotating shaft 413, the first roller 412 is less likely to jump or deflect during the switching process, the displacement of the telescopic sliding component 410 is more accurate, and the rotating mechanism 200 is more likely to stay stably when it reaches the first state or the second state. This improves the positioning accuracy of the actuator 300 and reduces problems such as incomplete mode switching, unclear state recognition, and air circuit linkage error caused by guide deviation.

[0153] In some embodiments, please refer to Figure 4 and Figure 8 The elastic abutment mechanism 400 also includes a fixed mounting base 430, and the telescopic sliding component 410 is rotatably mounted on the fixed mounting base 430.

[0154] The fixed mounting base 430 is a fixed component used to carry, position and support the telescopic sliding assembly 410. It provides a relatively stable mounting reference and rotation fulcrum for the elastic abutment mechanism 400, so that the telescopic sliding assembly 410 can maintain a predetermined motion trajectory and force direction when it is driven to extend and retract by the elastic element 420 and keeps in contact with the first slide rail 201, thereby reducing the impact of assembly deviation and working sway on the state maintenance capability.

[0155] The mounting base 430 can be disposed on the base 100 or fixedly mounted to the body 10 as an independent component. For example, the mounting base 430 can be a plate-type mounting base, a block-type mounting base, a bracket-type mounting base, or an integrally molded base body. The material can be metal, aluminum alloy, engineering plastic, or composite material to balance strength, processability, and corrosion resistance.

[0156] In some embodiments, please refer to Figure 4 and Figure 5A second rotating shaft 110 is provided on the base 100, and the rotating mechanism 200 is connected to the second rotating shaft 110.

[0157] The second rotating shaft 110 is a shaft-type connector used to support the rotation of the rotating mechanism 200 relative to the base 100. Its function is to provide a stable and repeatable rotation center for the rotating mechanism 200, thereby ensuring that the rotating mechanism 200 has a high degree of angular consistency when switching between the first state and the second state, and keeping the linkage relationship between it and the actuator 300 and the elastic abutment mechanism 400 stable.

[0158] The second rotating shaft 110 can be set in the shaft hole, bushing or bearing seat of the base 100. The rotating mechanism 200 is connected to the second rotating shaft 110 by means of center hole fit, key connection, press fit, thread locking, pin connection or riveting, so that the rotating mechanism 200 can rotate relative to the second rotating shaft 110 without significant radial movement or axial displacement.

[0159] The second shaft 110 can be made into a cylindrical shaft, a stepped shaft, a splined shaft, or a hollow shaft. Cylindrical shafts are easier to machine and assemble, stepped shafts facilitate the formation of axial limiting structures, splined shafts improve torque transmission reliability, and hollow shafts are beneficial for weight reduction or for accommodating internal wiring and air guiding structures. Understandably, the specific type of the second shaft 110 can be selected according to specific requirements.

[0160] In some embodiments, please refer to Figures 4 to 8 The rotating mechanism 200 has a second slide 203, and the actuator 300 is adapted to slide on the second slide 203. When the rotating mechanism 200 switches between a first state and a second state, the actuator 300 slides from one end of the second slide 203 to the other end of the second slide 203.

[0161] The second slide 203 is a type of guide structure formed on the rotating mechanism 200. It is used to convert the angular displacement of the rotating mechanism 200 into the linear displacement of the actuator 300, so that the actuator 300 can achieve directional movement within a predetermined trajectory, thereby cooperating with the base 100 to complete the linear movement of the actuator 300.

[0162] In one possible embodiment, the second slide 203 may be disposed in the end face, side wall, or internal cavity of the rotating seat 210. The actuator 300 may be embedded in or abut against the second slide 203 and slide back and forth along the second slide 203 as the rotating mechanism 200 rotates. The function of the second slide 203 is to limit the movement direction of the actuator 300 and provide a travel boundary, so that when the rotating mechanism 200 switches from the first state to the second state, it can mechanically guide the actuator 300 to move from one end to the other end, thereby driving the valve stem assembly 22 to complete the switching of the air passage.

[0163] The second slide 203 can be a channel formed by a combination of straight and curved sections, or it can be a curved channel, a ramp channel, or a stepped channel. It can also be further formed by a spiral channel or a cam channel. The surface of the second slide can be composed of a metal precision-machined surface, an injection-molded surface, a surface coating surface, or a wear-resistant insert surface to improve wear resistance and repeated switching life.

[0164] When the rotating mechanism 200 is in the first state, the actuator 300 is located at one end of the second slide 203 and corresponds to the corresponding air passage. When the operator pushes or rotates the rotating mechanism 200 to switch from the first state to the second state, the second slide 203 on the rotating mechanism 200 is displaced relative to the actuator 300. The guide boundary within the second slide 203 exerts a continuous constraint and pushing effect on the actuator 300, causing the actuator 300 to slide smoothly from one end to the other along the slide. Since the actuator 300 is also restricted by the base 100, the angular displacement of the rotating mechanism 200 can be stably converted into the linear displacement of the actuator 300. When the rotating mechanism 200 switches back from the second state to the first state, the actuator 300 returns to its initial position under the reverse guidance of the second slide 203, forming a bidirectional controllable linkage relationship.

[0165] Based on the above analysis, it can be seen that by setting a second slide rail 203 on the rotating mechanism 200 and making the actuator 300 slide in cooperation with the second slide rail 203, the smoothness of movement of the actuator 300 under the cooperation of the rotating mechanism 200 and the base 100 can be effectively improved, thereby reducing the obstruction of the actuator 300 to the rotating mechanism 200 and improving the smoothness of operation of the manual mechanical control switch 23.

[0166] Figure 8 This diagram illustrates a structure of a manual mechanical switch 23 that removes the base 100 and part of the rotating mechanism 200 according to an embodiment of this application. Figure 9 A schematic diagram of a base 100 provided according to an embodiment of this application is shown.

[0167] In some embodiments, please refer to Figure 8 and Figure 9 The actuator 300 includes a push rod 310 and a second roller 320 rotatably disposed at one end of the push rod 310. The push rod 310 is movably engaged on the base 100, and the second roller 320 is adapted to slide on the second slide rail 203.

[0168] The push rod 310 in the aforementioned actuator 300 is a force transmission component used to make linear reciprocating motion in a predetermined direction within the base 100. Its function is to receive the displacement change transmitted by the rotating mechanism 200 through the second slide rail 203 and further output the displacement to the valve stem assembly 22 to realize the switching of the anesthesia machine between manual mode and machine control mode.

[0169] The push rod 310 is typically disposed within the moving channel 101 of the base 100. One end of the push rod 310 faces the rotating mechanism 200, and a second roller 320 is rotatably mounted at this end, enabling the second roller 320 to participate in the transmission as a rolling contact element that contacts the second slide rail 203. The second roller 320 is connected to the end of the push rod 310 via a pin, axle, or small bearing, thereby maintaining a relatively stable rolling posture when the push rod 310 moves and reducing the sliding friction between the push rod 310 and the second slide rail 203.

[0170] To accommodate different structural designs, in one possible embodiment, the push rod 310 can be a round rod, square rod, flat rod, or step guide rod, and the material can be stainless steel, aluminum alloy, carbon steel, or engineering plastic; the second roller 320 can be a metal wheel, plastic wheel, bearing wheel, or ball wheel, and the material can be stainless steel, POM, PA, ceramic, or composite material to balance strength, wear resistance, and low friction performance.

[0171] In the above structure, the second roller 320 can rotate freely relative to the end of the push rod 310. When the rotating mechanism 200 switches between the first state and the second state, the second slide 203 applies a guiding effect to the second roller 320, causing the second roller 320 to roll along the second slide 203 and drive the push rod 310 to move linearly along the base 100, thereby converting the rotation output of the rotating mechanism 200 into the linear displacement of the push rod 310.

[0172] In some embodiments, please refer to Figure 4 , Figure 5 , Figure 8 and Figure 9 The rotating mechanism 200 includes a rotating base 210 and a handle 220 connected to the rotating base 210. The handle 220 has an operating part 221 that extends outward.

[0173] The rotating base 210 is the main component that undertakes the rotation linkage. It is used as the rotating base in the manual mechanical control switch 23 to cooperate with the subsequent transmission components. The first slide rail 201 and the second slide rail 203 in the above embodiment can be set on the rotating base 210.

[0174] The handle 220 is a manual component for the operator to apply force. It transmits external input force to the rotating base 210 via its connection to the rotating base 210. The operating part 221 extends outward from the handle 220 and is used to directly drive the rotating base 210 to rotate. This operating part 221 is typically configured as an extended structure that can be manually turned, pressed, or rotated, allowing medical personnel to quickly identify and access the corresponding switching position during anesthesia machine use, thereby completing the mode switch between manual and machine-controlled modes.

[0175] The rotating base 210 can be rotatably mounted on the base 100 and serves as the main body of the rotation center. The handle 220 can be fixedly connected, detachably connected, or integrally formed and is set on the outside of the rotating base 210. The operating part 221 extends outward to provide the operator with a clear force application end.

[0176] It should be noted that the specific structure of the rotary seat 210 is not limited in the embodiments of this application. The rotary seat 210 can have different structural shapes by combining the specific structures of the first slide rail 201 and the second slide rail 203.

[0177] During operation, the operator can directly grasp or move the extended operating part 221 of the handle 220, causing the rotating seat 210 to undergo angular displacement around the base 100, and transmitting this rotation to the cooperating actuator 300 and the elastic abutment mechanism 400. Because the handle 220 and its operating part 221 form a clear external control end, the operator can quickly locate the corresponding switch position on the anesthesia machine and complete the state switch with minimal force. Simultaneously, the outward-extending structure of the operating part 221 provides high visibility and accessibility, reducing the probability of accidental activation of other controls and mitigating operational deviations caused by hand posture limitations. Combined with the stable rotation of the rotating seat 210 and the subsequent maintenance of the corresponding state by the elastic abutment mechanism 400, the rotating mechanism 200 can more accurately reach the predetermined position when switching between the first and second states, and the pattern recognition is more precise.

[0178] Therefore, the design of the handle 220 and the extended operating part 221 improves the human-machine interaction performance of the manual control switch 23 of the anesthesia machine, enabling medical staff to complete mode switching more conveniently and reliably. On the other hand, it also helps to improve the stability and accuracy of the rotation input of the rotating mechanism 200, thereby enhancing the accuracy of the gas path switching of the whole machine and the safety of use.

[0179] In some embodiments, please refer to Figure 4The manual control switch 23 also includes a protective connection cover 500 connected to the base 100. The protective connection cover 500 is provided with a connection structure 510 suitable for mounting on the body 10 of the anesthesia machine along its circumference. The protective connection cover 500 has a control slot 520. The operating part 221 extends out of the control slot 520 and can rotate along the control slot 520.

[0180] The protective connecting cover 500 is a protective enclosure component used to externally protect the rotating mechanism 200, the elastic abutment mechanism 400, and the transmission components that cooperate with them. It forms a relatively closed or semi-closed protective space around the base 100 to isolate the internal moving parts from the external environment. The function of the protective connecting cover 500 is to prevent liquid splashes, dust particles, and other foreign objects from entering the manual mechanical switch 23, reducing the risk of accidental contact and contamination. Simultaneously, it provides stable guidance and limiting space for the operating unit 221, allowing the operator to switch states without directly contacting the internal mechanisms.

[0181] The protective connecting cover 500 can be connected to the outer periphery or side of the base 100 and form a detachable or fixed connection with the base 100. The connecting structure 510 arranged along its circumference can be a connecting column or other structure, used to cooperate with the mounting holes, slots, threaded seats, flanges or fastening parts on the anesthesia machine body 10, so that the manual control switch 23 can be assembled in a predetermined position on the anesthesia machine.

[0182] The control slot 520 is provided corresponding to the operation unit 221. After the operation unit 221 extends out of the slot, it can rotate along the arc length direction of the slot and maintain a visible, accessible and non-deviating operation path under the limitation of the protective connecting cover 500.

[0183] The protective connecting cover 500 can be configured as a ring cover, a semi-ring cover, a box cover, or a split cover, depending on the overall structure of the machine. A ring cover is suitable for circumferentially covering the rotating mechanism 200; a semi-ring cover facilitates localized protection within limited installation space; a box cover is suitable for flush or embedded arrangement with the machine body 10 panel; and a split cover facilitates assembly and maintenance. The protective connecting cover 500 can be made of transparent or semi-transparent PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene), POM, stainless steel, or aluminum alloy, etc., to balance strength, cleaning and disinfection resistance, and visibility. If necessary, wear-resistant bushings or rounded corners can be added to the edge of the slot to reduce frictional resistance when the operating part 221 rotates.

[0184] Figure 10 A schematic diagram of the structure of a manual mechanical switch 23 removing the photoelectric switch base 630 according to an embodiment of this application is shown.

[0185] In some embodiments, please refer to Figure 8 and Figure 10 The manual control switch 23 also includes a first displacement detection mechanism 600, which is used to detect the position of the actuator 300.

[0186] The first displacement detection mechanism 600 is a detection unit used to sense the linear displacement state of the actuator 300 and output a corresponding signal. Its function is to monitor the position of the actuator 300 in real time, so as to confirm whether the actuator 300 has moved to the predetermined position during the process of the rotating mechanism 200 completing the switching between the first state and the second state.

[0187] The first displacement detection mechanism 600 is usually arranged on the side, end or middle of the motion path of the actuator 300 and fixedly connected to the base 100 so that its detection reference remains stable relative to the base 100. When the actuator 300 moves back and forth along the base 100 under its push or drive, the detection mechanism can identify the position change of the actuator 300 in a non-contact or light contact manner.

[0188] When the operator drives the rotating mechanism 200 to switch between the first state and the second state, the actuator 300 moves linearly along the base 100. During the movement of the actuator 300, the first displacement detection mechanism 600 continuously detects its position and outputs a corresponding signal when the actuator 300 reaches the designated position, so that the external control unit can determine in time whether the current mode has been switched.

[0189] In some specific embodiments, the first displacement detection mechanism 600 includes a blocking member 610 and a photoelectric switch 620. The photoelectric switch 620 has a transmitter 621 and a receiver 622 disposed opposite to each other. The blocking member 610 is connected to the actuator 300 and can move together with the actuator 300. The blocking member 610 can move between the transmitter 621 and the receiver 622 to trigger a first signal.

[0190] The shielding component 610 is a light-shielding component used to enter the photoelectric switch 620 to detect the light path and change the on / off state of the light path. Its function is to synchronously change with the displacement of the actuator 300, perform non-contact identification of the current position of the actuator 300, and convert the position information into an electrical signal to be output to the subsequent control or display unit, so as to facilitate the determination of whether the manual mechanical control switch 23 has been switched to the required state.

[0191] The shield 610 and the actuator 300 can be connected by means of integral molding, snap-fit, screw fixing, glue bonding or plug-in. For example, the shield 610 can be connected to the end of the push rod 310.

[0192] It should be understood that the photoelectric switch 620 can be fixedly installed. For example, the photoelectric switch 620 can be installed in the base 100 (when the base 100 is large enough). In addition, a special housing structure can be configured for the photoelectric switch 620, such as the photoelectric switch holder 630 in the following embodiment.

[0193] When the actuator 300 moves along the base 100 under the drive of the rotating mechanism 200, the blocking member 610 fixed on the actuator 300 moves synchronously with the actuator 300 and gradually approaches the detection channel 631 formed by the transmitting end 621 and the receiving end 622 of the photoelectric switch 620. When the blocking member 610 enters the predetermined position between the transmitting end 621 and the receiving end 622 and completely blocks the light path, the photoelectric switch 620 immediately generates a first signal, which the control system can use to identify whether the actuator 300 has reached the correct position. Since this detection method uses the on / off state of the light path to determine the position state, it does not rely on mechanical impact or large contact pressure, thus reducing wear during long-term repeated switching and reducing misjudgments caused by elastic fatigue, gap changes, or mechanical vibration. At the same time, the non-contact identification method of the transmitting end 621 and the receiving end 622 can improve the position detection sensitivity, making the signal output more clear when the actuator 300 reaches the preset position, thereby improving the position confirmation accuracy and action reliability of the manual control switch 23 during the anesthesia machine mode switching process.

[0194] Figure 11 A schematic diagram of the structure of a photoelectric switch holder 630 according to an embodiment of this application is shown; Figure 12 A schematic diagram of the structure of a photoelectric switch holder 630 provided according to an embodiment of this application is shown from another angle.

[0195] In some specific embodiments, please refer to Figure 4 , Figure 8 , Figure 11 and Figure 12 The first displacement detection mechanism 600 also includes a photoelectric switch base 630, which is connected to the base 100. The photoelectric switch base 630 has a detection channel 631 adapted to the movement of the shield 610. The photoelectric switch base 630 also has a receiving cavity 631a for accommodating the photoelectric switch 620. The receiving cavity 631a has a first opening 632 and a second opening 633 communicating with the detection channel 631. The transmitting end 621 is exposed from the first opening 632, and the receiving end 622 is exposed from the second opening 633.

[0196] The photoelectric switch base 630 is a support body used to position, protect and guide the installation of the photoelectric switch 620. The photoelectric switch 620 can be a block base, a housing 21 base, an embedded base or a bracket base. It is used to stably fix the photoelectric switch 620 on the base 100 and to maintain a corresponding relationship between the optical path position of the photoelectric switch 620 and the movement trajectory of the blocking member 610.

[0197] The photoelectric switch 620 provides mechanical support and external protection to prevent the detection stability from being affected by collisions, vibrations or dust intrusion in the medical environment. On the other hand, by forming a detection channel 631, the shield 610 can pass through the optical path area in a restricted path during the movement, thereby improving the consistency and repeatability of the position detection of the actuator 300.

[0198] The photoelectric switch holder 630 is usually installed on the side of the base 100 near the movement path of the actuator 300, or in the reserved installation space inside the base 100. Its receiving cavity is used to embed or accommodate the photoelectric switch 620 body. The first opening 632 and the second opening 633 correspond to the light-emitting position of the emitting end 621 and the light-receiving position of the receiving end 622 of the photoelectric switch 620, respectively. The detection channel 631 is aligned with the reciprocating movement direction of the blocking member 610, so that the blocking member 610 can enter or leave the light path without interfering with other components.

[0199] The photoelectric switch base 630 can be made of insulating engineering plastics such as ABS, PC, PBT, and PA, or metal materials such as aluminum alloy or stainless steel. It can also be configured as an integral injection molded part, a split assembly part, or a metal insert type base according to assembly needs.

[0200] Figure 13 A schematic diagram of a manual mechanical switch 23 according to an embodiment of this application is shown, which removes another angle from the base 100 and part of the rotating mechanism 200.

[0201] In some embodiments, please refer to Figure 13 The manual control switch 23 also includes a second displacement detection mechanism 700, which is used to detect the position of the rotating mechanism 200.

[0202] The second displacement detection mechanism 700 is a state recognition unit used to sense the angular state of the rotating mechanism 200 and output the corresponding detection results. Its function is to determine in real time whether the rotating mechanism 200 is in the first state or the second state, thereby providing a basis for the anesthesia machine's pattern recognition, operation feedback and safety interlock.

[0203] The second displacement detection mechanism 700 is typically located in a fixed area of ​​the base 100, beside the rotation trajectory of the rotating mechanism 200, or at other suitable positions. It works in conjunction with a corresponding trigger structure on the rotating mechanism 200 to reliably acquire position change information during the rotation of the rotating mechanism 200. Furthermore, by providing this second displacement detection mechanism 700, it can cooperate with the aforementioned first displacement detection mechanism 600, ensuring that the position of the rotating mechanism 200 can still be detected even if one of them fails to function.

[0204] During operation, when the operator drives the rotating mechanism 200 to rotate, the triggering structure on the rotating mechanism 200 enters the sensing area of ​​the second displacement detection mechanism 700. The detection mechanism then outputs a corresponding electrical signal according to the position change of the triggering element, thereby determining the current angular state of the rotating mechanism 200 and feeding back the state to the control system or display unit.

[0205] In some specific embodiments, the rotating mechanism 200 is provided with a protrusion 230, and the second displacement detection mechanism 700 includes a micro switch 710. When the rotating mechanism 200 switches between a first state and a second state, the protrusion 230 can act on the micro switch 710.

[0206] The protrusion 230 is an example of the aforementioned triggering structure. The protrusion 230 is a localized protrusion formed on the surface of the rotating mechanism 200, used to contact the Weidong switch when the rotating mechanism 200 rotates to a predetermined angle. The microswitch 710 is a small switching element that achieves electrical state transition through mechanical triggering. It typically contains a contact assembly and a reset spring, capable of outputting a detection signal when pressed by an external force and automatically resetting after the external force is released.

[0207] During operation, when the operator drives the rotating mechanism 200 to rotate, the protrusion 230 of the rotating mechanism 200 moves along a predetermined trajectory. When the rotating mechanism 200 approaches the first state or the second state, the protrusion 230 gradually enters the triggering range of the micro switch 710 and acts on the micro switch 710. The micro switch 710 then switches from the initial state to the output state and sends a corresponding position signal to the external control system. When the rotating mechanism 200 leaves the micro switch 710, the micro switch 710 returns to the initial state under the action of the internal reset spring.

[0208] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0209] In the description of this application, it should be understood that the terms "comprising" and "having" and any variations thereof used in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0210] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. 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 technical features indicated.

[0211] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A manual mechanical control switch, characterized in that, include: Base; A rotating mechanism is rotatably mounted on the base, and the rotating mechanism has a first state and a second state. An actuator, which moves in coordination with the base, is able to act on the actuator and drive it to move along the base when the rotating mechanism switches between the first state and the second state. And an elastic abutment mechanism, wherein when the rotating mechanism is in the first state, the elastic abutment mechanism is used to provide a first elastic force to the rotating mechanism to maintain the rotating mechanism in the first state, and when the rotating mechanism is in the second state, the elastic abutment mechanism is used to provide a second elastic force to the rotating mechanism to maintain the rotating mechanism in the second state.

2. The manual mechanical control switch according to claim 1, characterized in that, The rotating mechanism has a first slide rail, and the elastic abutment mechanism is adapted to slide on the first slide rail. When the rotating mechanism switches between the first state and the second state, the elastic abutment mechanism slides from one end of the first slide rail to the other end of the first slide rail.

3. The manual mechanical control switch according to claim 2, characterized in that, The rotating mechanism also has an intermediate state between the first state and the second state. When the rotating mechanism is in the intermediate state, the elastic abutment mechanism is used to provide a third elastic force to the rotating mechanism. The third elastic force is greater than the first elastic force and the second elastic force.

4. The manual mechanical control switch according to claim 2, characterized in that, The elastic abutment mechanism includes a telescopic sliding component and an elastic element. The telescopic sliding component is rotatably configured, and it is capable of telescopic extension and retraction. One end of the telescopic sliding component is adapted to slide onto the first slide rail. The elastic element is used to drive the telescopic sliding component to extend and retract.

5. The manual mechanical control switch according to claim 4, characterized in that, The telescopic sliding assembly includes a telescopic assembly and a first roller disposed at the end of the telescopic assembly. The first roller is adapted to slide on the first slide rail, and the elastic element is sleeved on the outer periphery of the telescopic assembly. The telescopic assembly includes a first sleeve and a second sleeve, the second sleeve being movably disposed within the first sleeve, the elastic element abutting between the first sleeve and the first sleeve, and the first roller being connected to the second sleeve.

6. The manual mechanical control switch according to claim 5, characterized in that, The telescopic sliding assembly further includes a first rotating shaft disposed at the end of the telescopic assembly, the first roller is connected to the first rotating shaft, the rotating mechanism forms strip grooves on both sides of the first slide, and the first rotating shaft is adapted to move and engage in the strip grooves.

7. The manual mechanical control switch according to any one of claims 1 to 6, characterized in that, The rotating mechanism has a second slide, and the actuator is adapted to slide on the second slide. When the rotating mechanism switches between the first state and the second state, the actuator slides from one end of the second slide to the other end of the second slide.

8. The manual mechanical control switch according to claim 7, characterized in that, The actuator includes a push rod and a second roller rotatably disposed at one end of the push rod. The push rod is movably engaged on the base, and the second roller is adapted to slide on the second slide rail.

9. The manual mechanical control switch according to any one of claims 1 to 6, characterized in that, The rotating mechanism includes a rotating base and a handle connected to the rotating base, the handle having an outwardly extending operating part; The manual control switch also includes a protective connecting cover connected to the base. The protective connecting cover has a connecting structure along its circumference that is suitable for mounting onto the body of the anesthesia machine. The protective connecting cover has a control slot, and the operating part extends out of the control slot and can rotate along the control slot.

10. The manual mechanical control switch according to any one of claims 1 to 6, characterized in that, The manual mechanical control switch further includes a first displacement detection mechanism, which is used to detect the position of the actuator; The first displacement detection mechanism includes a blocking component and a photoelectric switch. The photoelectric switch has a transmitting end and a receiving end arranged opposite to each other. The blocking component is connected to the actuator and can move together with the actuator. The blocking component can move between the transmitting end and the receiving end to trigger a first signal. The first displacement detection mechanism further includes a photoelectric switch holder connected to the base. The photoelectric switch holder has a detection channel adapted to the movement of the blocking member. The photoelectric switch holder also has a receiving cavity for accommodating the photoelectric switch. The receiving cavity has a first opening and a second opening communicating with the detection channel. The transmitting end protrudes from the first opening, and the receiving end protrudes from the second opening.

11. The manual mechanical control switch according to any one of claims 1 to 6, characterized in that, The manual control switch also includes a second displacement detection mechanism, which is used to detect the position of the rotating mechanism; The rotating mechanism is provided with a protrusion, and the second displacement detection mechanism includes a micro switch. When the rotating mechanism switches between the first state and the second state, the protrusion can act on the micro switch.

12. An airway switching device, characterized in that, include: The housing has a first air passage and a second air passage; The valve stem assembly is movably disposed within the housing; And a manual mechanical control switch according to any one of claims 1 to 11, wherein the actuator in the manual mechanical control switch can act on the valve stem assembly and drive the valve stem assembly to move, so as to realize the switching of the first air passage and the second air passage.

13. The airway switching device according to claim 12, characterized in that, The housing has a first cavity, a second cavity, and a third cavity arranged sequentially along the axial direction of the valve stem assembly. A first communication port is provided between the first cavity and the second cavity, and a second communication port is provided between the second cavity and the third cavity. The valve stem assembly includes a valve stem and a first sealing member sleeved on the valve stem. The valve stem passes through the first cavity, the second cavity, and the third cavity. When the valve stem assembly moves, the first sealing member has a first sealing position that seals the first communication port and a second sealing position that seals the second communication port. When the first sealing member is in the first sealing position, the second cavity and the third cavity communicate to form the first air passage. When the first sealing member is in the second sealing position, the second cavity and the first cavity communicate to form the second air passage.

14. The airway switching device according to claim 13, characterized in that, The valve stem assembly further includes a second seal sleeved on the valve stem. The second seal and the first seal are spaced apart along the axial direction of the valve stem. The second seal is disposed near the end of the valve stem. The second seal includes an inner edge, an outer edge, and an arched portion connecting the inner edge and the outer edge. The inner edge is adapted to be sleeved on the valve stem.

15. An anesthesia machine, characterized in that, It includes the fuselage and the airway switching device as described in any one of claims 12 to 14, which is disposed on the fuselage.

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