Knob protection mechanism and respiratory anesthesia machine

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a knob protection mechanism and an anaesthesia machine. The knob protection mechanism comprises a housing, a sealing plate, a transparent warning plate and an elastic piece, the housing is provided with a first knob receding groove and a first scale perspective window, and the sealing plate is assembled in the housing in a front-back sliding mode; the second knob abdicating groove can control the exposed length of the knob, and the exposed length of the knob is not enough to hold in a normal state so as to prevent misoperation. The rear end of the transparent warning plate is hinged to the housing, the front end of the transparent warning plate is slidably hinged to the sealing plate, the transparent warning plate synchronously overturns along with the sealing plate during adjustment to shield the first scale perspective window, and striking warning is formed through orange-yellow color. The mechanism is further provided with a limiting sliding groove, a limiting protrusion, a shifting block and other structures, the operation process is simplified, one-hand operation is adapted, and disassembly, assembly and maintenance are convenient. The respiration anesthesia machine comprising the mechanism can improve the safety and convenience of standby oxygen regulation, is suitable for various medical scenes, and provides reliable guarantee for regulation and control of surgical anesthesia oxygen supply.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a knob protection mechanism and a respiratory anesthesia machine. Background Technology

[0002] For major surgeries, general anesthesia is often required, and inhalation anesthesia is a commonly used method. During anesthesia, the gas outlet of the inhalation anesthesia machine forms a circuit with the patient's airway, delivering fresh gas and inhaled anesthetic drugs into the patient's airway and expelling the patient's exhaled air.

[0003] The respiratory anesthesia machine is equipped with a spare oxygen knob, which is usually located on the machine itself. However, this knob is exposed, posing a risk of misoperation since medical staff do not frequently use the spare oxygen. To address this issue, a protective structure has been added to the respiratory anesthesia machine. However, existing protective mechanisms are typically flip-type opening and closing structures (e.g., Chinese utility model patent titled "Opening and Closing Protective Door and Respiratory Anesthesia Machine," publication number CN219354967U). This type of structure uses a flip cover to obscure the knob; to operate the knob, the cover must be opened first, and then closed again afterward, making the process cumbersome. Especially in emergency situations, the extra step of opening the cover delays the knob adjustment, failing to meet the need for rapid operation. Therefore, to address these problems, we propose a knob protection mechanism and a respiratory anesthesia machine.

[0004] The methods described in this section are not necessarily methods that had been previously conceived or adopted. Unless otherwise specified, no method described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be accepted in any prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a knob protection mechanism and a respiratory anesthesia machine, which solves the problems of cumbersome operation and delayed operation in emergency scenarios of the existing flip-type protection structure, while realizing the functions of misoperation protection, rapid operation and warning during operation.

[0006] To achieve the above objectives, one technical solution adopted by the present invention is:

[0007] A knob protection mechanism, comprising:

[0008] The cover has an opening at the front end and a first knob clearance groove corresponding to the knob and a first scale viewing window corresponding to the flow rate window on its rear wall.

[0009] The sealing plate is slidably fitted into the cover and cannot be completely slid out of the cover. It has a second knob clearance groove and a second scale viewing window.

[0010] A transparent warning panel, the rear end of which is hinged to the cover, and the front end of which is slidably hinged to the sealing plate;

[0011] An elastic element is used to push the sealing plate forward until the length of the knob extending out of the second knob relief groove is less than the minimum length required for human hand gripping and operation;

[0012] When the length of the knob extending beyond the second knob clearance groove is less than the length sufficient for gripping, the transparent warning plate does not obstruct the first scale viewing window. In this state, as the sealing plate slides backward, the transparent warning plate will simultaneously flip and gradually obstruct the first scale viewing window.

[0013] Furthermore, the front end of the transparent warning plate is slidably hinged to the sealing plate via a first rotating shaft, and the side wall of the cover has a limiting groove. The first rotating shaft is slidably embedded in the limiting groove to prevent the sealing plate from completely sliding out of the cover.

[0014] Furthermore, when the sealing plate is at the foremost point of its sliding stroke, the transparent warning plate is not perpendicular to the sealing plate.

[0015] Furthermore, the inner side of the limiting groove has a limiting protrusion;

[0016] During the sliding process of the sealing plate from the front end of the sliding stroke to the rear under the external force, the first rotating shaft can slide backward along the limiting groove until it abuts against the limiting protrusion. The limiting protrusion undergoes elastic deformation to avoid the first rotating shaft. After the first rotating shaft passes the limiting protrusion, the limiting protrusion will deform and return to its original position. If the external force is removed at this time, the sealing plate will be driven by the elastic force of the elastic element to abut against the first rotating shaft. The elastic force of the elastic element is insufficient to allow the limiting protrusion to elastically deform and avoid the protrusion. The limiting protrusion will restrict the first rotating shaft from returning to its original position, so that the sealing plate is kept in a position where the exposed length of the knob is sufficient to hold it, and the transparent warning plate remains to block the first scale viewing window.

[0017] Furthermore, the limiting groove is a through groove that penetrates the cover, and the first rotating shaft penetrates the limiting groove;

[0018] The portion of the first rotating shaft located outside the casing is connected to a lever.

[0019] Furthermore, the rear end of the transparent warning panel is hinged to the cover via a second pivot, and the elastic element is configured as a torsion spring sleeved on the outside of the second pivot, with the lever arms on both sides of the torsion spring abutting against the cover and the transparent warning panel respectively.

[0020] Furthermore, both the first and second rotating shafts are vertically arranged.

[0021] Furthermore, the rear side of the sealing plate has a slide block, the slide block has a sliding groove extending to the left and right, and the first rotating shaft is slidably embedded in the sliding groove.

[0022] Furthermore, the transparent warning plate has a first axial hole and a second axial hole at its front and rear ends, respectively;

[0023] The slide block is located below the first shaft hole, the toggle block cannot pass through the limiting slide groove, and the slide block is assembled with the limiting slide groove, the first shaft hole and the slide groove from top to bottom in sequence;

[0024] The inner side of the cover is provided with a bearing seat located below the second shaft hole, and the upper side of the cover has a third shaft hole;

[0025] The upper end of the second rotating shaft is fixedly connected to a limiting member that cannot pass through the third shaft hole. The second rotating shaft is assembled with the third shaft hole, the elastic member, the second shaft hole and the shaft seat in sequence from top to bottom.

[0026] A respiratory anesthesia machine, comprising the knob protection mechanism described in any one of the above claims.

[0027] The present invention has at least the following beneficial effects:

[0028] This invention offers precise and reliable protection against misoperation and is adaptable to various scenarios. Through the sliding stroke design of the sealing plate, the length of the knob extending beyond the second knob recess can be controlled to be less than the minimum length required for a human hand to hold. This length can be flexibly adjusted to different states: it can be a state where the knob is partially exposed but insufficient for gripping, meeting the component positioning requirements of conventional equipment; it can also be a state where the knob is completely flush with the sealing plate; or a state where the knob is retracted into the second knob recess and the sealing plate forms a protective edge. The latter two states are particularly suitable for scenarios with extremely high protection requirements. Switching between these different states does not require altering the overall structure of the protection mechanism; it can be achieved simply by adjusting the size of the sealing plate, making it highly adaptable.

[0029] In terms of operation, this invention significantly simplifies the steps, enabling efficient response in emergency situations. Compared to traditional flip-type protective mechanisms, this invention eliminates the need for additional flip-top opening and closing steps. Medical personnel can easily expose the knob by gently pushing the sealing plate with one hand. The action from pushing the sealing plate to turning the knob is continuous and smooth, without requiring the hand to change position. When frequent knob adjustments are needed, the limiting protrusion can lock the sealing plate in the appropriate position, eliminating the need for continuous force from medical personnel. The reset operation can be completed simply by hooking and pulling the lever, maintaining a consistent direction of force. The entire operation process is seamless and uninterrupted. Even in emergency situations, medical personnel can quickly complete the operation instinctively, effectively avoiding delays in adjustment due to cumbersome procedures and ensuring timely oxygen supply during surgical anesthesia.

[0030] The warning function of this invention is intuitive and eye-catching, significantly reducing interference during collaborative operations. The transparent warning panel is made of orange-yellow transparent acrylic material, which does not obstruct the first scale viewing window under normal conditions, and does not affect medical staff's observation of the flow rate window scale; when the adjustment knob is turned, the transparent warning panel will flip synchronously with the sealing plate, and the orange-yellow color will cover the flow rate window area, forming a strong visual contrast with the white and light gray of the main body of the equipment. Even in the complex lighting environment of the operating room, the surrounding medical staff can quickly notice that the spare oxygen knob is being adjusted, thereby avoiding interference from misoperation.

[0031] This invention also offers the advantage of convenient disassembly and maintenance, reducing subsequent usage costs. Through the pivot-type assembly structure, disassembly only requires pulling out the relevant pivot to remove the sealing plate, transparent warning plate, and elastic components sequentially, without the need for complex tools. The limiting design of the slide, shaft, and other structures effectively prevents components from falling off, ensuring assembly stability and simplifying the maintenance process.

[0032] This invention significantly improves the overall safety and practicality of respiratory anesthesia machines. Respiratory anesthesia machines incorporating this knob protection mechanism greatly reduce the risk of misoperation during oxygen supply adjustment through precise protection of the spare oxygen knob, efficient operation control, and prominent warning prompts. The elastic element provides stable driving force, ensuring reliable protection under normal conditions, while the locking function of the limit protrusion adapts to frequent adjustment scenarios, ensuring the safety and convenience of oxygen regulation during surgical anesthesia from multiple dimensions. The overall design combines practicality and innovation, and can be widely applied to respiratory anesthesia equipment in various medical scenarios, providing more reliable protection for patient safety. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1This is a schematic diagram of an embodiment of the knob protection mechanism of the present invention installed on a respiratory anesthesia machine;

[0035] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0036] Figure 3 for Figure 2 Enlarged structural diagram at point B;

[0037] Figure 4 This is a partial cross-sectional schematic diagram of an embodiment of the knob protection mechanism of the present invention installed on a respiratory anesthesia machine;

[0038] Figure 5 for Figure 4 Enlarged structural diagram at point C;

[0039] Figure 6 for Figure 4 Enlarged structural diagram at point D;

[0040] Figure 7 This is a partial cross-sectional schematic diagram of an embodiment of the knob protection mechanism of the present invention;

[0041] Figure 8 for Figure 7 Enlarged structural diagram at point E;

[0042] Figure 9 for Figure 7 Enlarged structural diagram at point F;

[0043] Figure 10 This is a schematic diagram of the cover structure in one embodiment of the knob protection mechanism of the present invention;

[0044] Figure 11 This is a schematic diagram of the transparent warning plate in one embodiment of the knob protection mechanism of the present invention;

[0045] Figure 12 This is a schematic diagram of the sealing plate in one embodiment of the knob protection mechanism of the present invention.

[0046] The meanings of the labels in the attached diagram are as follows:

[0047] Cover 1, First knob clearance groove 11, First scale viewing window 12, Limiting slide groove 13, Limiting protrusion 131, Shaft seat 14, Third shaft hole 15, Sealing plate 2, Second knob clearance groove 21, Second scale viewing window 22, Slide seat 23, Slide groove 231, Stabilizing seat 24, Stabilizing groove 241, Transparent warning plate 3, First shaft hole 31, Second shaft hole 32, Elastic element 4, Lever arm 41, Knob 5, Flow window 6, First rotating shaft 7, Toggle block 71, Second rotating shaft 8, Limiting element 81. Detailed Implementation

[0048] The invention will now be further described with reference to the accompanying drawings.

[0049] Reference Figures 1-12 As shown, the knob protection mechanism in this embodiment includes a cover 1, a sealing plate 2, a transparent warning plate 3, and an elastic element 4.

[0050] In this embodiment, the cover 1 serves as the mounting base for the protective mechanism, with an opening at its front end and its rear wall fixed to the body of the respiratory anesthesia machine (other embodiments may also consider detachable fixing). The rear wall of the cover 1 is provided with a first knob clearance groove 11 and a first scale viewing window 12; wherein, the first knob clearance groove 11 corresponds to the spare oxygen knob 5 on the respiratory anesthesia machine and is used to avoid the knob 5; the first scale viewing window 12 corresponds to the flow window 6 on the respiratory anesthesia machine, and medical staff can observe the oxygen flow scale on the flow window 6 through the first scale viewing window 12; the first and second scale viewing windows can be hollow structures or transparent parts installed in corresponding positions, and this embodiment is a hollow structure.

[0051] In this embodiment, the sealing plate 2 is assembled inside the housing 1 by sliding back and forth, and is structurally limited to ensure that it cannot completely slide out of the housing 1. The sealing plate 2 has a second knob clearance groove 21 and a second scale viewing window 22; the second knob clearance groove 21 is coaxially corresponding to the first knob clearance groove 11, and is also used to avoid the knob 5; the second scale viewing window 22 corresponds to the first scale viewing window 12 and does not affect the observation of the flow scale. The sliding stroke of the sealing plate 2 determines the exposed length of the knob 5: when the sealing plate 2 is at the front end of the sliding stroke, the length of the knob 5 extending out of the second knob clearance groove 21 is less than the minimum length required for human hand grip operation (i.e., medical staff cannot hold the knob 5 for adjustment, realizing the protection against misoperation); when the sealing plate 2 slides backward to a certain position, the length of the knob 5 extending out of the second knob clearance groove 21 meets the human hand grip requirements and can be adjusted.

[0052] It should be noted that the length is less than the minimum length required for human hand grip (the minimum exposed length for an adult to grip a round knob adjustment is usually 15-20mm), and it can be flexibly set to positive, zero, or negative values. The core principle is that knob 5 cannot be effectively operated under normal conditions, as detailed below:

[0053] Positive value: Five parts of the knob are exposed (e.g., 1-10mm), but the length is insufficient for gripping. This design allows medical staff to quickly locate the knob while preventing accidental activation; this embodiment adopts this type.

[0054] Zero value: The front end of knob 5 is flush with the sealing plate 2 and has no exposed parts.

[0055] Negative value: Knob 5 retracts into the second knob clearance groove 21 (e.g., retracted 1-5mm), and the sealing plate 2 forms a protective edge. This can prevent hands and foreign objects from contacting the knob.

[0056] The three possible values ​​can be achieved without altering the overall structure of the protection mechanism; only the size of the sealing plate 2 needs to be adjusted, thus adapting to different protection and usage requirements.

[0057] In this embodiment, the transparent warning panel 3 is made of a transparent material (such as acrylic or transparent PC), serving both warning and visibility functions. The rear end of the transparent warning panel 3 is hinged to the housing 1, and the front end is slidably hinged to the sealing plate 2; its movement is synchronized with the sliding of the sealing plate 2: when the sealing plate 2 slides back and forth, the transparent warning panel 3 simultaneously rotates around the rear hinge point. Specifically, when the knob 5 is extended to a length insufficient for gripping (the sealing plate 2 is at its foremost position), the transparent warning panel 3 is in a state where the first scale viewing window 12 is not obstructed, thus not affecting the observation of the flow rate scale; when the sealing plate 2 slides backward (during the process of medical personnel operating the knob 5), the transparent warning panel 3 simultaneously rotates, gradually obstructing the first scale viewing window 12, conveying a warning signal of "currently adjusting the standby oxygen knob" to surrounding medical personnel through visual changes in the transparent material (such as light and shadow obstruction and color changes).

[0058] Furthermore, in this embodiment, the transparent warning panel 3 is specifically made of orange-yellow transparent acrylic material. This material has a striking orange-yellow hue; when the transparent warning panel 3 is flipped to cover the first scale viewing window 12, the orange-yellow color covers the observation area of ​​the flow rate window 6, creating a visual distinction from the main body of the equipment (mostly white or light gray), forming a strong visual cue so that medical personnel can quickly notice that "the backup oxygen knob is being adjusted," avoiding misoperation. In other embodiments, other colors that can serve a warning purpose, such as red or yellow, can also be considered.

[0059] In this embodiment, the elastic element 4 provides a forward driving force to the sealing plate 2, which is used to push the sealing plate 2 to the front end of the sliding stroke under normal conditions, ensuring that the knob 5 is not extended long enough to be held, thus avoiding accidental operation.

[0060] To optimize the function of the protection mechanism, the present invention further refines the above-mentioned basic structure, as follows:

[0061] In this embodiment, the front end of the transparent warning plate 3 is slidably hinged to the sealing plate 2 via a first rotating shaft 7. An arc-shaped limiting groove 13 is provided on the top wall of the cover 1. The center of the limiting groove 13 is concentric with the rear hinge point of the transparent warning plate 3. The upper end of the first rotating shaft 7 is slidably embedded within the limiting groove 13. By limiting the sliding stroke of the first rotating shaft 7 through the limiting groove 13, the sliding range of the sealing plate 2 is indirectly limited, ensuring that the sealing plate 2 will not completely slide out of the cover 1. A limiting protrusion is provided on each of the two inner sidewalls at the same position of the limiting groove, enhancing the limiting strength.

[0062] In this embodiment, when the sealing plate 2 is at the front end of its sliding stroke, the transparent warning plate 3 is not perpendicular to the sealing plate 2. This design avoids the "inflection point jamming" problem of the transparent warning plate 3 in the initial sliding phase of the sealing plate 2, ensuring smooth and synchronized sliding of the sealing plate 2 and flipping of the transparent warning plate 3.

[0063] In this embodiment, the inner wall of the limiting groove 13 is integrally formed (other embodiments may also consider a detachable connection) and has a limiting protrusion 131. The limiting protrusion 131 is made of an elastic material (such as elastic plastic) and has a certain elastic deformation capability. When the sealing plate 2 is subjected to external force (medical staff push the sealing plate 2 backward) and slides backward from the front end, the first rotating shaft 7 slides backward along the limiting groove 13 until it abuts against the limiting protrusion 131; if the external force is continued to be applied, the limiting protrusion 131 undergoes elastic deformation to avoid the first rotating shaft 7, so that the first rotating shaft 7 can smoothly slide past the limiting protrusion 131; after the first rotating shaft 7 slides past the limiting protrusion 131, the limiting protrusion 131 elastically resets. If the external force is removed at this time, the sealing plate 2 tends to return to its original position under the elastic force of the elastic element 4. However, the elastic force of the elastic element 4 is insufficient to cause the limiting protrusion 131 to deform elastically again. The limiting protrusion 131 will block the first rotating shaft 7 from sliding forward, thus keeping the sealing plate 2 in the position where "the exposed length of the knob 5 is sufficient for gripping". The transparent warning plate 3 also remains in the state of blocking the first scale viewing window 12. This structure is suitable for scenarios that require frequent adjustment of the knob 5, eliminating the need for medical staff to continuously push the sealing plate 2 backward, thus improving the convenience of operation. If a reset is required, only a larger external force needs to be applied to push the first rotating shaft 7 forward, causing the limiting protrusion 131 to deform again to avoid the obstruction.

[0064] In this embodiment, the limiting groove 13 is a through groove that penetrates the side wall of the cover 1. The upper end of the first rotating shaft 7 penetrates the limiting groove 13 and extends to the outside of the cover 1. A lever 71 is fixedly connected to the portion of the first rotating shaft 7 located on the outside of the cover 1 (the diameter or width of the lever 71 is greater than the width of the limiting groove 13 to prevent the lever 71 from sliding into the cover 1). Medical personnel can move the lever 71 to slide the first rotating shaft 7, which facilitates quick operation when resetting is required and improves the feel of operation.

[0065] In this embodiment, the rear end of the transparent warning plate 3 is hinged to the cover 1 via the second pivot 8; the elastic element 4 is a torsion spring sleeved on the outside of the second pivot 8, and the lever arms 41 on both sides of the torsion spring abut against the inner sidewall of the cover 1 and the sidewall of the transparent warning plate 3, respectively. The torsion spring continuously applies a flipping force to the transparent warning plate 3 through its own elastic deformation. This flipping force is transmitted to the sealing plate 2 through the first pivot 7 at the front end of the transparent warning plate 3, thereby driving the sealing plate 2 to slide forward, realizing the transmission of the driving force of the elastic element 4 to the sealing plate 2.

[0066] In this embodiment, both the first rotating shaft 7 and the second rotating shaft 8 are vertically arranged, causing the transparent warning plate 3 to flip in the left-right direction. This design is compatible with the "vertical elongated flow window 6" commonly found on respiratory anesthesia machines: the left-right flipping transparent warning plate 3 does not occupy too much front and back space, and can completely block the vertically arranged first scale viewing window 12, balancing space utilization and warning effect.

[0067] In this embodiment, the rear side of the sealing plate 2 is integrally formed with a slide 23 (other embodiments may also consider welding or screwing). The slide 23 has a groove 231 extending in the left-right direction, and the first rotating shaft 7 is slidably embedded in the groove 231. In this embodiment, a stabilizing seat 24 with a similar structure to the slide 23 is also provided on the rear side of the sealing plate 2. It is located above the transparent warning plate. The stabilizing seat 24 has a stabilizing groove 241 similar to the groove 231. The first rotating shaft 7 passes through the stabilizing groove 241 to improve the structural connection strength. When the sealing plate 2 slides back and forth, the first rotating shaft 7 can slide adaptively in the groove 231 to ensure that the flipping of the transparent warning plate 3 and the sliding of the sealing plate 2 do not interfere with each other, thus improving the smoothness of movement.

[0068] To improve the ease of assembly and disassembly of components, the following design features were also incorporated in this embodiment:

[0069] The transparent warning plate 3 has a first shaft hole 31 and a second shaft hole 32 at its front and rear ends, respectively. The first shaft hole 31 is used to pass through the first rotating shaft 7, and the second shaft hole 32 is used to pass through the second rotating shaft 8.

[0070] The slide block 23 is located below the first shaft hole 31. The slide groove 231 of the slide block 23 is aligned with the first shaft hole 31. The first rotating shaft 7 passes through the limiting slide groove 13 and the first shaft hole 31 from top to bottom and is embedded in the slide groove 231. Since the toggle block 71 cannot pass through the limiting slide groove 13, it can prevent the first rotating shaft 7 from falling downward.

[0071] The inner wall of the cover 1 is integrally formed with a bearing seat 14, which is located below the second shaft hole 32. The upper side of the cover 1 has a third shaft hole 15. The upper end of the second rotating shaft 8 is fixedly connected to a limiting member 81 (the diameter of the limiting member 81 is larger than the diameter of the third shaft hole 15 to prevent the second rotating shaft 8 from falling downward). The second rotating shaft 8 is assembled from top to bottom with the third shaft hole 15, the elastic member 4 (torsion spring), the second shaft hole 32 and the bearing seat 14.

[0072] The above structure enables quick assembly and disassembly of each component: during disassembly, simply pull out the first rotating shaft 7 and the second rotating shaft 8 upwards to remove the sealing plate 2, the transparent warning plate 3, and the elastic element 4 in sequence, which facilitates later maintenance or replacement of components.

[0073] The respiratory anesthesia machine of this embodiment includes a body, a spare oxygen knob 5, a flow rate window 6, and a knob protection mechanism as described in the above technical solution; the knob protection mechanism is fixed to the body by a cover 1, and ensures that the first knob clearance groove 11 corresponds to the spare oxygen knob 5 and the first scale viewing window 12 corresponds to the flow rate window 6.

[0074] Working principle

[0075] Normal state (anti-misoperation state): The elastic element 4 (torsion spring) applies a flipping force to the transparent warning plate 3 through the lever arm 41. The transparent warning plate 3 drives the first rotating shaft 7 to slide forward along the limiting slide groove 13, thereby pushing the sealing plate 2 to the front end of the sliding stroke. At this time, the knob 5 extends beyond the second knob, and the length of the groove 21 is insufficient for a person to hold, so medical staff cannot operate the knob 5, effectively preventing misoperation; at the same time, the transparent warning plate 3 is in a state where the first scale viewing window 12 is not obstructed, and medical staff can normally observe the scale of the flow window 6.

[0076] Single adjustment operation (emergency / temporary operation): When adjustment of knob 5 is required, medical staff push the sealing plate 2 backward, causing it to slide backward. The second knob clearance groove 21 then moves backward, gradually increasing the exposed length of knob 5. Simultaneously, the transparent warning plate 3 rotates around the second pivot 8, gradually obscuring the first scale viewing window 12 and transmitting a warning signal to the medical staff. When the sealing plate 2 slides to the point where the exposed length of knob 5 meets the gripping requirements, the medical staff can hold knob 5 for adjustment. After adjustment, the external force is released, and the elastic element 4 drives the sealing plate 2 to return to its normal position, and knob 5 is back in the anti-misoperation state.

[0077] Frequent adjustment operation (continuous operation): If frequent adjustment of knob 5 is required, medical staff should push the sealing plate 2 backward until the first rotating shaft 7 slides past the limiting protrusion 131. At this time, the external force is removed, the limiting protrusion 131 blocks the first rotating shaft 7 from resetting forward, and the sealing plate 2 remains in the position where "the exposed length of knob 5 is sufficient for gripping". Medical staff can adjust knob 5 multiple times without continuously pushing the sealing plate 2. After the operation is completed, the toggle block 71 is moved forward so that the first rotating shaft 7 squeezes the limiting protrusion 131 and slides past it. The elastic element 4 drives the sealing plate 2 to reset and return to normal.

[0078] It is worth mentioning that the force application process of this knob protection mechanism during actual adjustment is smooth and continuous, perfectly suited for one-handed operation. Medical staff can easily push the sealing plate 2 with one hand, and break through the limiting protrusion 131 with a little force; after pushing it to the position, there is no need to move the hand, just grasp the exposed knob 5 to adjust it. The "push" and "turn" are completed in one go without any pause. When resetting, the fingertip can be used to hook and pull the lever 71 lightly. The direction of force is the same as when adjusting. The whole set of actions is smooth and natural, and can be completed quickly even in emergency situations.

[0079] In summary, the knob protection mechanism of this embodiment, through the coordinated design of the cover 1, sealing plate 2, transparent warning plate 3, and elastic element 4, combined with the refined structure of the first rotating shaft 7, second rotating shaft 8, and limiting protrusion 131, not only solves the problem of cumbersome operation of traditional flip-type protection mechanisms, but also achieves multiple functions such as preventing misoperation under normal conditions, providing warnings during adjustment, and rapid response in emergency scenarios. Its orange-yellow transparent warning plate 3 enhances visual cues, and the "push-turn-reset" force application process is smooth and continuous during one-handed operation. The disassembly and assembly structure also facilitates later maintenance. Furthermore, a respiratory anesthesia machine incorporating this protection mechanism can further improve the safety and convenience of backup oxygen regulation, providing reliable assurance for oxygen supply control during surgical anesthesia. It combines practicality and innovation and can be widely applied to respiratory anesthesia equipment in various medical scenarios.

[0080] In the description of this invention, 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," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0081] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "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 mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0083] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A knob protection mechanism, characterized in that, include: The cover has an opening at the front end and a first knob clearance groove corresponding to the knob and a first scale viewing window corresponding to the flow rate window on its rear wall. The sealing plate is slidably fitted into the cover and cannot be completely slid out of the cover. It has a second knob clearance groove and a second scale viewing window. A transparent warning panel, with its rear end hinged to the cover and its front end slidably hinged to the sealing plate; The elastic element is used to push the sealing plate forward until the length of the knob extending out of the second knob relief groove is less than the minimum length required for human hand to hold and operate; When the length of the knob extending beyond the second knob clearance slot is less than the length sufficient for gripping, the transparent warning plate does not obstruct the first scale viewing window. In this state, as the sealing plate slides backward, the transparent warning plate will simultaneously flip and gradually obstruct the first scale viewing window.

2. The knob protection mechanism according to claim 1, characterized in that: The front end of the transparent warning panel is slidably hinged to the cover plate via a first rotating shaft. The side wall of the cover has a limiting groove, and the first rotating shaft is slidably embedded in the limiting groove to prevent the cover plate from sliding out of the cover completely.

3. The knob protection mechanism according to claim 2, characterized in that: When the sealing plate is at the front end of its sliding stroke, the transparent warning plate is not perpendicular to the sealing plate.

4. The knob protection mechanism according to claim 3, characterized in that: The inner side of the limiting groove has a limiting protrusion; During the sliding process of the sealing plate from the front end of the sliding stroke to the rear under the external force, the first rotating shaft can slide backward along the limiting groove until it abuts against the limiting protrusion. The limiting protrusion undergoes elastic deformation to avoid the first rotating shaft. After the first rotating shaft passes the limiting protrusion, the limiting protrusion will return to its original shape. If the external force is removed at this time, the sealing plate will be driven by the elastic force of the elastic element to abut against the limiting protrusion. The elastic force of the elastic element is not enough to allow the limiting protrusion to elastically deform and avoid the protrusion. The limiting protrusion will restrict the first rotating shaft from returning to its original shape, so that the sealing plate is kept in a position where the exposed length of the knob is sufficient to hold it, and the transparent warning plate keeps blocking the first scale viewing window.

5. The knob protection mechanism according to claim 4, characterized in that: The limiting slide is a through groove that penetrates the cover, and the first rotating shaft passes through the limiting slide; The first rotating shaft, located on the outer side of the casing, is connected to a lever.

6. The knob protection mechanism according to claim 5, characterized in that: The rear end of the transparent warning panel is hinged to the cover via a second pivot. The elastic element is configured as a torsion spring sleeved on the outside of the second pivot, and the lever arms on both sides of the torsion spring abut against the cover and the transparent warning panel respectively.

7. The knob protection mechanism according to claim 6, characterized in that: Both the first and second rotating shafts are set vertically.

8. The knob protection mechanism according to claim 7, characterized in that: The back of the sealing plate has a slide seat with left and right extending grooves, and the first rotating shaft is slidably embedded in the groove.

9. The knob protection mechanism according to claim 8, characterized in that: The transparent warning panel has a first shaft hole and a second shaft hole at its front and rear ends, respectively. The slide block is located below the first shaft hole, and the push block cannot pass through the limiting slide groove. The slide block is assembled with the limiting slide groove, the first shaft hole and the slide groove from top to bottom in sequence. The inner side of the cover is provided with a bearing seat located below the second shaft hole, and the upper side of the cover has a third shaft hole; The upper end of the second rotating shaft is fixed with a limiting component that cannot pass through the third shaft hole. The second rotating shaft is assembled with the third shaft hole, the elastic component, the second shaft hole and the shaft seat in sequence from top to bottom.

10. A respiratory anesthesia machine, characterized in that: Includes the knob protection mechanism as described in any one of claims 1-9.

Images