Absorption canister lifting device and anesthesia machine

Abstract

The utility model relates to medical instrument field especially, and it is a kind of absorption tank lifting device and anesthesia machine.A kind of absorption tank lifting device includes fixed base, drive mechanism, tray and locking mechanism, drive mechanism includes gear and rack, gear is rotatably installed in fixed base;The outer periphery of gear includes arc-shaped meshing part, and meshing part includes multiple meshing teeth, and meshing tooth is engaged with rack, and the top end of rack supports tray, and tray is suitable for placing absorption tank;Gear can rotate under the action of external force, to drive rack to move up and down, to drive tray to lift in turn, locking mechanism can limit the relative motion of rack and gear when external force is cancelled.Gear and the engagement transmission of rack are used to convert rotary motion into the up-and-down linear motion of rack, and tray is lifted using rack, to improve the stability of tray when lifting.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an absorption tank lifting device and an anesthesia machine. Background Technology

[0002] In the application of anesthesia machines, to prevent the patient from re-inhaling exhaled carbon dioxide, an absorption canister containing a carbon dioxide absorbent is installed in the anesthesia breathing circuit. The absorbent reacts chemically with the carbon dioxide in the canister to remove it from the patient's exhaled air, preventing re-inhalation. Existing absorption canisters require a lifting device to raise and lower them; once raised to a certain height, the canister connects to the breathing circuit.

[0003] However, the existing lifting device uses a rotating eccentric cam to lift the tray used to hold the absorption tank, which has poor stability during lifting. Summary of the Invention

[0004] The technical problem to be solved by this utility model is: to address the issue of poor stability of the pallet during lifting and lowering in existing lifting devices, and to provide an absorption tank lifting device and an anesthesia machine.

[0005] To address the aforementioned problems, this utility model provides an absorption tank lifting device, comprising a fixed base, a driving mechanism, a tray, and a locking mechanism. The driving mechanism includes a toothed component and a rack, with the toothed component rotatably mounted on the fixed base. The outer periphery of the toothed component includes an arc-shaped meshing portion, the meshing portion including multiple meshing teeth, the meshing teeth engaging with the rack, the top end of the rack supporting the tray, and the tray being suitable for placing the absorption can; The toothed component can rotate under external force to drive the rack to move up and down, thereby driving the tray to rise and fall. The locking mechanism can restrict the relative movement of the rack and the toothed component when the external force is removed.

[0006] Optionally, the outer periphery of the toothed member further includes an abutment portion, the locking mechanism includes a locking block and an elastic member, the toothed member is located between the locking block and the rack in a first direction, the elastic member extends along the first direction, one end of the elastic member is fixed relative to the position of the fixed seat, and the other end of the elastic member abuts against the locking block; The locking block abuts against the abutting portion under the elastic force of the elastic member, thereby restricting the rotation of the toothed member; wherein, the first direction is perpendicular to the extension direction of the rack and the direction of the rotation center line of the toothed member.

[0007] Optionally, the outer side of the abutting portion includes a first abutting plane and a second abutting plane, the first abutting plane is located on one side of the second abutting plane along the first rotation direction, and the locking block has a locking surface perpendicular to the first direction; When the tray is at its highest position, the locking surface abuts against and fits against the first abutting plane; when the tray is at its lowest position, the locking surface abuts against and fits against the second abutting plane; wherein, the first rotation direction is the rotation direction of the toothed member when the rack moves downward.

[0008] Optionally, the fixed base is provided with an adjustment hole extending along the first direction, an adjustment member is installed in the adjustment hole, the position of the adjustment member in the adjustment hole is adjustable, and one end of the elastic member is inserted into the adjustment hole and abuts against the adjustment member.

[0009] Optionally, the toothed component further includes a first rotating shaft, the toothed component being rotatably mounted on the fixed base via the first rotating shaft, the first rotating shaft having a power end extending out of the fixed base, and the toothed component being able to rotate under the action of an external force at the power end.

[0010] Optionally, a limiting block is provided on the first rotating shaft. The limiting block protrudes radially outward from the first rotating shaft. The limiting block includes a first limiting surface and a second limiting surface. The second limiting surface is located on one side of the first limiting surface along a first rotation direction. The first rotation direction is the rotation direction of the toothed member when the rack moves downward. When the tray is in its highest position, the first limiting surface contacts the inner wall surface of the top plate of the fixed base; when the tray is in its lowest position, the second limiting surface contacts the inner wall surface of the top plate of the fixed base.

[0011] Optionally, it also includes a handle, the handle including a pivot portion, an extension portion and a grip portion, the grip portion extending in a direction parallel to the extension direction of the first pivot, the pivot portion and the grip portion being arranged parallel to each other and spaced apart, the extension portion extending in a horizontal direction and connecting the pivot portion and the grip portion; The rotating shaft portion is provided with a through hole extending along the extension direction of the first rotating shaft, and the power end of the first rotating shaft is inserted into the through hole and fixedly connected to the rotating shaft portion.

[0012] Optionally, the top of the rack is provided with a support block, the top of the support block having a support surface extending in a horizontal direction, the support surface supporting the bottom of the tray.

[0013] Optionally, it also includes a guide post, one of the fixing seat and the tray is fixedly connected to one end of the guide post, the other of the fixing seat and the tray is provided with a guide hole, the guide hole extends in the vertical direction, and the other end of the guide post is inserted into the guide hole.

[0014] On the other hand, this utility model embodiment provides an anesthesia machine, including an anesthesia machine body and the above-mentioned absorption tank lifting device, wherein the fixing seat is fixed to the anesthesia machine body.

[0015] This invention relates to an absorption tank lifting device. The toothed component can rotate under external force, driving a rack that meshes with the toothed part of the component to move linearly up and down. This, in turn, raises and lowers the tray holding the absorption tank. After rotation stops, a locking mechanism restricts the relative movement between the rack and the toothed component, allowing the rack to statically support the tray and maintain it at the desired height. The entire absorption tank lifting device utilizes the meshing transmission between the toothed component and the rack to convert rotational motion into linear up-and-down motion of the rack. The meshing transmission between the toothed component and the rack is precise and smooth, and the rack drives the tray to rise and fall, improving the stability of the tray's movement. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the structure of the absorption tank lifting device provided in one embodiment of the present invention; Figure 2 for Figure 1 Cross-sectional view; Figure 3 for Figure 1 A structural diagram showing the concealed tray and suspension components; Figure 4 for Figure 3 Exploded view.

[0018] The reference numerals in the accompanying drawings are as follows: 1. Fixed base; 11. Fixed shell; 12. Suspension component; 13. Guide groove; 14. Adjusting component; 15. Adjusting hole; 16. Guide hole; 2. Toothed component; 21. Meshing tooth part; 22. Abutting part; 221. First abutting plane; 222. Second abutting plane; 23. First rotating shaft; 24. Limiting block; 241. First limiting surface; 242. Second limiting surface; 3. Rack; 31. Support block; 4. Guide sleeve; 5. Tray; 6. Locking block; 61. Locking surface; 7. Elastic component; 8. Guide post; 9. Handle; 91. Rotating shaft part; 92. Extension part; 93. Grip part. Detailed Implementation

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

[0020] One embodiment of this utility model provides an absorption tank lifting device, such as... Figures 1 to 3 As shown, it includes a fixed base 1, a drive mechanism, a tray 5, and a locking mechanism. The drive mechanism includes a toothed component 2 and a rack 3, with the toothed component 2 rotatably mounted on the fixed base 1.

[0021] The outer periphery of the toothed part 2 includes an arc-shaped toothed portion 21, which includes multiple teeth that mesh with the rack 3. The top of the rack 3 supports the tray 5, which is suitable for placing the absorption tank.

[0022] The toothed component 2 can rotate under the action of external force to drive the rack 3 to move up and down, thereby driving the tray 5 to rise and fall. The locking mechanism can restrict the relative movement between the rack 3 and the toothed component 2 when the external force is removed.

[0023] Specifically, when the absorption tank needs to be lifted, the toothed part 2 is rotated by external force, which drives the rack 3 that meshes with the toothed part 2 to move upward, so as to convert the rotational motion into the linear motion of the rack 3 in the up and down direction. The tray 5 supported by the rack 3 moves upward with the rack 3 to the set height, and then stops rotating. The locking mechanism restricts the relative movement between the rack 3 and the toothed part 2 so that the rack 3 supports the tray 5 and keeps it at that height position.

[0024] The absorption tank lifting device of this utility model utilizes external force to rotate the toothed component 2, thereby driving the rack 3, which meshes with the toothed component 2, to move linearly up and down. This, in turn, raises and lowers the tray 5 used to hold the absorption tank. After rotation stops, a locking mechanism restricts the relative movement between the rack 3 and the toothed component 2, allowing the rack 3 to statically support the tray 5 and maintain it at the desired height. The entire absorption tank lifting device uses the meshing transmission between the toothed component 2 and the rack 3 to convert rotational motion into linear up and down motion of the rack 3, which in turn supports the raising and lowering of the tray 5. The meshing transmission between the toothed component 2 and the rack 3 is precise and stable, and the linearly moving rack 3 acts as a lifting component for the tray 5, resulting in better stability of the tray 5's movement.

[0025] In one embodiment, such as Figure 2 and Figure 4 As shown, the outer periphery of the toothed member 2 also includes an abutment portion 22. The locking mechanism includes a locking block 6 and an elastic member 7. The toothed member 2 is located between the locking block 6 and the rack 3 in the first direction. The elastic member 7 extends along the first direction. One end of the elastic member 7 is fixed relative to the position of the fixed seat 1, and the other end of the elastic member 7 abuts against the locking block 6.

[0026] The locking block 6 abuts against the contact portion 22 under the elastic force of the elastic member 7; wherein, the first direction is perpendicular to the extension direction of the rack 3 and the rotation center line direction of the toothed member 2. Figure 2 D1 in the diagram represents the first direction.

[0027] Specifically, when the toothed component 2 is not subjected to a rotational external force, the tray 5 and the absorption tank exert a downward axial pressure on the rack 3. However, the meshing force between the toothed component 2 and the rack 3, under the pressure of the locking block 6, can offset the axial pressure, allowing the rack 3 to stably support the tray 5 in a static state. After the toothed component 2 is subjected to a rotational external force, the toothed component 2 overcomes the pressure of the locking block 6 and rotates, thereby driving the rack 3, which meshes with the toothed component 2, to move linearly in the vertical direction.

[0028] The locking block 6, under the elastic force of the elastic element 7, abuts against the abutting block in real time, and can lock the toothed element 2 in time after the external force is removed.

[0029] Moreover, compared to the gear with a complete tooth ring, the toothed part 2 is designed with the circumferential distribution angle of the meshing part 21 according to the linear travel of the tray 5, so as to reduce the volume of the toothed part 2 and further reduce the space occupied by the drive mechanism.

[0030] In one embodiment, such as Figure 4 As shown, the elastic element 7 is a spring, and the locking block 6 has a mounting groove with an opening facing away from the rack 3. One end of the spring is fixed relative to the position of the fixed seat 1, and the other end of the spring is inserted into the positioning groove. In other embodiments, the elastic element 7 can be a rubber component.

[0031] Specifically, there are two springs. Correspondingly, the locking block 6 has two mounting slots spaced apart along the rotation center line of the toothed member 2, and a spring is installed in each mounting slot.

[0032] In one embodiment, such as Figure 2 and Figure 4 As shown, the outer surface of the abutting part 22 includes a first abutting plane 221 and a second abutting plane 222. The first abutting plane 221 is located on one side of the second abutting plane 222 along the first rotation direction. The locking block 6 has a locking surface 61 perpendicular to the first direction.

[0033] When the tray 5 is in the highest position, the locking surface 61 abuts against and fits against the first abutting plane 221. When the tray 5 is in the lowest position, the locking surface 61 abuts against and fits against the second abutting plane 222. The first rotation direction is the rotation direction of the toothed member 2 when the rack 3 moves downward. Figure 4 S1 in the equation represents the first rotation direction. Figure 2 and Figure 4 The tray 5 shown is in the highest position.

[0034] Normally, the highest position is the working height at which the absorption canister on tray 5 connects to the breathing circuit of the anesthesia machine, and the lowest position is the initial height of tray 5. Replacement of the absorption canister or other operations are performed at the initial height position. Tray 5 at the lowest and highest positions requires static support from rack 3.

[0035] The fitting arrangement of the locking surface 61 and the first abutting plane 221 can increase the contact area between the locking surface 61 and the abutting part 22, and the first abutting plane 221 only bears the abutting force in one direction of the locking block 6, avoiding the possibility of the toothed part 2 rotating circumferentially due to the component force in other directions, thereby improving the reliability and stability of the locking mechanism in locking the toothed part 2 and the rack 3 when the tray 5 is in the highest position.

[0036] Similarly, the fitting arrangement of the locking surface 61 and the second abutting plane 222 can increase the contact area between the locking surface 61 and the abutting part 22, and the second abutting plane 222 only bears the abutting force in a single direction of the locking block 6, avoiding the possibility of the toothed part 2 rotating circumferentially due to the component force in other directions, thereby improving the reliability and stability of the locking mechanism in locking the toothed part 2 and the rack 3 when the tray 5 is in the lowest position.

[0037] In one embodiment, as shown in Figure 3, the fixed base 1 is provided with an adjustment hole 15 extending in a first direction, and an adjustment member 14 is installed in the adjustment hole 15. The position of the adjustment member 14 in the adjustment hole 15 is adjustable, and one end of the elastic member 7 is inserted into the adjustment hole 15 and abuts against the adjustment member 14.

[0038] The compression of the elastic element 7 is adjusted by adjusting the position of the adjusting element 14 in the adjusting hole 15, thereby adjusting the abutting force of the locking block 6 against the toothed element 2 under the action of the elastic element 7, and thus adjusting the locking force between the toothed element 2 and the rack 3, so that the rack 3 can statically support absorption tanks of different weights.

[0039] Specifically, the adjusting hole 15 is an internally threaded hole, and the adjusting element 14 is threadedly connected in the adjusting hole 15.

[0040] In one embodiment, such as Figure 4 As shown, the toothed component 2 also includes a first rotating shaft 23. The toothed component 2 is rotatably mounted on the fixed base 1 via the first rotating shaft 23. The first rotating shaft 23 has a power end that extends out of the fixed base 1, and the toothed component 2 can rotate under the action of external force at the power end.

[0041] In one embodiment, such as Figure 4 As shown, a limiting block 24 is provided on the first rotating shaft 23. The limiting block 24 protrudes radially outward from the first rotating shaft 23. The limiting block 24 includes a first limiting surface 241 and a second limiting surface 242. The second limiting surface 242 is located on one side of the first limiting surface 241 along the first rotation direction. The first rotation direction is the rotation direction of the toothed member 2 when the rack 3 moves downward. S2 in the figure represents the first rotation direction.

[0042] When the pallet 5 is in its highest position, the first limiting surface 241 contacts the inner wall surface of the top plate of the fixed base 1; when the pallet 5 is in its lowest position, the second limiting surface 242 contacts the inner wall surface of the top plate of the fixed base 1.

[0043] The rotation range of the toothed member 2 is limited by the first limiting surface 241 and the second limiting surface 242 of the limiting block 24, thereby limiting the lifting stroke of the rack 3 and the tray 5. The highest position of the tray 5 can be located by the first limiting surface 241 and the lowest position of the tray 5 can be located by the second limiting surface 242, which facilitates the positioning of the moving position of the tray 5.

[0044] In one embodiment, such as Figure 4 As shown, a support block 31 is provided at the top of the rack 3. The top of the support block 31 has a support surface extending in the horizontal direction, and the support surface of the support block 31 supports the bottom of the pallet 5. The provision of the support block 31 can increase the area supporting the pallet 5 and improve the stability of the pallet 5.

[0045] In one embodiment, a downward-facing positioning groove is provided at the middle position of the bottom of the tray 5, and the support block 31 is installed in the positioning groove. The cross-sectional area of ​​the positioning groove is slightly larger than the cross-sectional area of ​​the support block 31. The positioning groove facilitates the positioning of the support block 31 to support the tray 5.

[0046] In one embodiment, such as Figure 3and Figure 4 As shown, it also includes a guide post 8, a fixed base 1, and a tray 5, one of which is fixedly connected to one end of the guide post 8. The other of the fixed base 1 and the tray 5 is provided with a guide hole 16, which extends in the vertical direction. The other end of the guide post 8 is inserted into the guide hole 16. When the rack 3 supports the tray 5 for lifting and lowering, the guide post 8 and the guide hole 16 guide and cooperate to improve the stability of the tray 5 when it moves up and down.

[0047] Specifically, the guide hole 16 is set on the fixed base 1, the guide sleeve 4 is installed in the guide hole 16, the tray 5 is provided with a first connecting hole extending in the vertical direction, one end of the guide post 8 is inserted into the first connecting hole from bottom to top and fixed by screws, and the other end of the guide post 8 is inserted into the guide sleeve 4.

[0048] The fixed base 1 shown in the figure has three guide holes 16. Correspondingly, the tray 5 has three first connecting holes. The three first connecting holes are located above the three guide holes 16 and correspond one-to-one with the three guide holes 16.

[0049] In one embodiment, such as Figure 3 and Figure 4 As shown, it also includes a handle 9, which includes a pivot portion 91, an extension portion 92 and a grip portion 93. The grip portion 93 extends in a direction parallel to the extension direction of the first pivot 23. The pivot portion 91 and the grip portion 93 are arranged parallel to each other and spaced apart. The extension portion 92 extends horizontally and connects the pivot portion 91 and the grip portion 93.

[0050] The rotating shaft 91 is provided with a through hole extending along the extension direction of the first rotating shaft 23, and the power end of the first rotating shaft 23 is inserted into the through hole and fixedly connected to the rotating shaft 91.

[0051] The toothed part 2 can be manually rotated via the handle 9, eliminating the need for an additional power unit, such as a motor, thus saving costs and reducing the overall weight of the absorption tank lifting device.

[0052] Meanwhile, the pivot 91 is coaxial with the first pivot 23, and the extension 92 increases the distance between the grip 93 and the pivot 91, thereby increasing the rotational torque and making it easier for the operator to turn the handle 9 with less force.

[0053] In other embodiments, the grip portion 93 of the handle 9 may be coaxial with the first rotating shaft 23. Alternatively, a rotary motor may be installed at the power end of the first rotating shaft 23.

[0054] In one embodiment, the rotating shaft 91 has a second connecting hole extending radially therefrom, and the first rotating shaft 23 has a threaded hole extending radially therefrom, through which a screw passes and is threadedly connected to the threaded hole. In other embodiments, a key connection can be used.

[0055] In one embodiment, the toothed member 2 has a central hole extending along the extension direction of the first rotating shaft 23. The first rotating shaft 23 passes through the central hole and is fixedly connected to the toothed member 2, for example by screw connection or key connection.

[0056] In other embodiments, the locking mechanism may include an elastic positioning pin, and multiple positioning holes spaced apart along the height direction may be provided on the rack 3. One end of the elastic positioning pin in the horizontal direction is fixed on the fixing base 1, and the other end of the elastic positioning pin in the horizontal direction can be inserted into the positioning hole to restrict the rack 3 from moving up and down.

[0057] In addition, one embodiment of this utility model also provides an anesthesia machine, including an anesthesia machine body and the absorption tank lifting device in any of the above embodiments. The fixing seat 1 is fixed to the anesthesia machine body, and the lifting device lifts the tray 5 to a set height. The absorption tank on the tray 5 is connected to the breathing circuit of the anesthesia machine body.

[0058] In one embodiment, such as Figure 1 and Figure 2 As shown, the mounting base 1 includes a mounting shell 11 and a suspension member 12. The lower end of the suspension member 12 is connected to the mounting shell 11, and the upper end of the suspension member 12 is connected to the shell of the anesthesia machine body.

[0059] The fixed shell 11 has a cavity, a locking mechanism and a toothed member 2 are installed in the cavity, and a through guide groove 13 is provided on the top plate of the fixed shell 11. The bottom end of the rack 3 passes through the guide groove 13 and extends into the cavity. The rack 3 can move up and down along the side wall of the guide groove 13.

[0060] The suspension member 12 increases the distance between the fixed housing 11 and the top surface of the anesthesia machine housing in the height direction, thereby preventing interference between the fixed housing 11 and the parts mounted on the fixed housing 11 and the tubing on the anesthesia machine. Furthermore, the top of the suspension member 12 can be used as the installation reference during installation.

[0061] Figure 4 The top plate of the fixed shell 11 shown is also provided with a clearance opening, which is connected to the guide groove 13. The clearance groove is used to avoid some of the teeth of the toothed part 2, so as to further reduce the depth of the cavity of the fixed shell 11 and reduce the volume of the fixed shell 11.

[0062] In one embodiment, the suspension member 12 includes a first connector, a suspension rod, and a second connector. The first connector and the second connector are located at both ends of the suspension rod along its length. The first connector is formed by bending the bottom end of the suspension rod to one side in the horizontal direction, and the second connector is formed by bending the top end of the suspension rod to the other side in the horizontal direction. The first connector is connected to the fixed shell 11 by screws, and the second connector can be fixedly connected to the shell of the anesthesia machine, specifically by screw connection or snap-fit.

[0063] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. An absorption tank lifting device, characterized in that, It includes a fixed base, a drive mechanism, a tray, and a locking mechanism. The drive mechanism includes a toothed component and a rack, and the toothed component is rotatably mounted on the fixed base. The outer periphery of the toothed component includes an arc-shaped meshing portion, the meshing portion including multiple meshing teeth, the meshing teeth engaging with the rack, the top end of the rack supporting the tray, and the tray being suitable for placing the absorption can; The toothed component can rotate under external force to drive the rack to move up and down, thereby driving the tray to rise and fall. The locking mechanism can restrict the relative movement of the rack and the toothed component when the external force is removed.

2. The absorption tank lifting device according to claim 1, characterized in that, The outer periphery of the toothed member also includes an abutment portion. The locking mechanism includes a locking block and an elastic member. The toothed member is located between the locking block and the rack in a first direction. The elastic member extends along the first direction. One end of the elastic member is fixed relative to the position of the fixed seat, and the other end of the elastic member abuts against the locking block. The locking block abuts against the abutting portion under the elastic force of the elastic member; wherein, the first direction is perpendicular to the extension direction of the rack and the rotation center line direction of the toothed member.

3. The absorption tank lifting device according to claim 2, characterized in that, The outer side of the abutting part includes a first abutting plane and a second abutting plane. The first abutting plane is located on one side of the second abutting plane along the first rotation direction. The locking block has a locking surface perpendicular to the first direction. When the tray is at its highest position, the locking surface abuts against and fits against the first abutting plane; when the tray is at its lowest position, the locking surface abuts against and fits against the second abutting plane; wherein, the first rotation direction is the rotation direction of the toothed member when the rack moves downward.

4. The absorption tank lifting device according to claim 2, characterized in that, The fixed base is provided with an adjustment hole extending along the first direction. An adjustment member is installed in the adjustment hole. The position of the adjustment member in the adjustment hole is adjustable. One end of the elastic member is inserted into the adjustment hole and abuts against the adjustment member.

5. The absorption tank lifting device according to claim 1, characterized in that, The toothed component further includes a first rotating shaft, which is rotatably mounted on the fixed base. The first rotating shaft has a power end that extends out of the fixed base, and the toothed component can rotate under the action of an external force at the power end.

6. The absorption tank lifting device according to claim 5, characterized in that, A limiting block is provided on the first rotating shaft. The limiting block protrudes radially outward from the first rotating shaft. The limiting block includes a first limiting surface and a second limiting surface. The second limiting surface is located on one side of the first limiting surface along a first rotation direction. The first rotation direction is the rotation direction of the toothed member when the rack moves downward. When the tray is in its highest position, the first limiting surface contacts the inner wall surface of the top plate of the fixed base; when the tray is in its lowest position, the second limiting surface contacts the inner wall surface of the top plate of the fixed base.

7. The absorption tank lifting device according to claim 5, characterized in that, It also includes a handle, which includes a pivot portion, an extension portion and a grip portion. The grip portion extends in a direction parallel to the extension direction of the first pivot portion. The pivot portion and the grip portion are arranged parallel to each other and spaced apart. The extension portion extends in a horizontal direction and connects the pivot portion and the grip portion. The rotating shaft portion is provided with a through hole extending along the extension direction of the first rotating shaft, and the power end of the first rotating shaft is inserted into the through hole and fixedly connected to the rotating shaft portion.

8. The absorption tank lifting device according to any one of claims 1 to 7, characterized in that, The top of the rack is provided with a support block, and the top of the support block has a support surface extending in a horizontal direction, which supports the bottom of the tray.

9. The absorption tank lifting device according to any one of claims 1 to 7, characterized in that, It also includes a guide post, one of the fixed base and the tray is fixedly connected to one end of the guide post, the other of the fixed base and the tray is provided with a guide hole, the guide hole extends in the vertical direction, and the other end of the guide post is inserted into the guide hole.

10. An anesthesia machine, characterized in that, The device includes an anesthesia machine body and an absorption tank lifting device as described in any one of claims 1 to 9, wherein the fixing base is fixed to the anesthesia machine body.

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