Dustproof cover and medical gas terminal

Abstract

The utility model relates to the field of medical equipment, and provides a dustproof cover and a medical gas terminal. The dustproof cover comprises a bottom shell, an upper cover and a turning cover. The upper cover is detachably connected with the bottom shell, an insertion through hole is formed in the upper cover, and the insertion through hole penetrates through the upper cover and the bottom shell. The turnover cover is provided with a turnover shaft, a first limiting part and a second limiting part are arranged on the side face of the turnover shaft at intervals, and the bottom of the first limiting part and the bottom of the second limiting part form height differences with the side face of the turnover shaft. An elastic limiting piece is formed on the bottom shell, and the turning cover is connected with the bottom shell and the upper cover in a turning mode through a turning shaft so that the turning cover can be switched between a covering state and an opening state. According to the dustproof cover provided by the utility model, while the dustproof effect of the dustproof cover on the insertion through hole can be effectively ensured, the situation that the dustproof cover is opened or closed by mistake due to misoperation is reduced, and the convenience and the safety of the dustproof cover during use are effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of medical device equipment, in particular to a dust cover and a medical gas terminal. Background Art

[0002] To facilitate the docking of a ventilator with a central oxygen supply station, a common hospital ward provides a fixed oxygen inhalation interface device for patients. This device consists of a gas terminal connected to a gas cannula. The existing gas terminal is provided with a jack for inserting the gas cannula. A dust cover is configured at the jack, and a rotating structure is provided at the connection part between the dust cover and the jack, so that the dust cover can be flipped relative to the jack, thereby facilitating the dust cover to be flipped and closed at the jack to prevent the jack from being exposed and accumulating dust.

[0003] However, in actual use, the existing dust cover is easily interfered by the outside, resulting in the dust cover being accidentally opened or closed, affecting the dust-proof effect of the dust cover, and at the same time, it is easy to interfere with medical staff when inserting the gas cannula. Summary of the Utility Model

[0004] In order to solve the defects of the prior art, the utility model provides a dust cover and a medical gas terminal, which can effectively ensure the dust-proof effect of the dust cover on the insertion through-hole, while reducing the accidental opening or closing of the dust cover caused by misoperation, and effectively improving the convenience and safety of the dust cover during use.

[0005] In order to solve the above technical problems, the utility model provides a dust cover, including:

[0006] A bottom shell;

[0007] An upper cover detachably connected to the bottom shell. The upper cover is formed with an insertion through-hole, and the insertion through-hole penetrates through the upper cover and the bottom shell;

[0008] A flip cover provided with a flip shaft. A first limiting portion and a second limiting portion are arranged at intervals on the side surface of the flip shaft. The bottoms of the first limiting portion and the second limiting portion both form a height difference with the side surface of the flip shaft;

[0009] The bottom shell is formed with an elastic limiting member. The flip cover is flip-connected to the bottom shell and the upper cover through the flip shaft, so that the flip cover can be switched between a closed state and an open state; wherein, in the closed state, the flip cover covers the insertion through-hole, and the elastic limiting member abuts against the first limiting portion; in the open state, the elastic limiting member abuts against the second limiting portion.

[0010] Wherein, both the first limiting portion and the second limiting portion are concave arc surfaces, and the elastic limiting member is adapted to abut against the concave arc surfaces.

[0011] Among them, the bottom shell is formed with a connecting boss, the connecting boss is provided with a rotating hole, the flip axis is passed through the rotating hole, and the flip axis is rotatably connected to the rotating hole; the elastic limiting member is an elastic rib, the elastic rib is formed on the side wall of the connecting boss, and the upper end of the elastic rib protrudes from the rotating hole.

[0012] The plug-in through hole is formed with a first inner wall surface and a second inner wall surface, the first inner wall surface is located on the upper cover, and the second inner wall surface is located on the bottom shell;

[0013] The side wall of the flip cover is formed with a first inclined surface, and the first inner wall surface of the plug-in through hole is formed with a second inclined surface. In the closed state, the first inclined surface abuts against the second inclined surface.

[0014] A step hole is formed on a side of the upper cover facing away from the bottom shell, the step hole is coaxial with the plug-in through hole, and the second inclined surface is formed on a side wall surface of the step hole.

[0015] The first inclined surface is provided with a first magnetic attraction component, and the second inclined surface is provided with a second magnetic attraction component. In the covered state, the first magnetic attraction component and the second magnetic attraction component are magnetically connected.

[0016] Wherein, the second inclined surface is provided with a sealing ring, and in the covering state, the sealing ring is tightly attached to the first inclined surface.

[0017] Wherein, the upper cover is provided with an avoidance notch.

[0018] Among them, one of the upper cover and the bottom shell is provided with a plurality of bosses, and the other of the upper cover and the bottom shell is provided with a plurality of grooves, and the bosses are inserted into the corresponding grooves so that the upper cover and the bottom shell are snap-connected.

[0019] Correspondingly, the utility model also provides a medical gas terminal, which comprises a device body and a dust cover as described in any one of the above items, wherein the device body is provided with a mounting hole, and the dust cover is inserted into the mounting hole.

[0020] The implementation of this utility model has the following beneficial effects:

[0021] According to the dust cover provided in this embodiment, after the bottom shell of the dust cover is inserted into the plug hole of the gas terminal, when the dust cover is needed to protect the plug hole from dust, the flip cover is closed on the plug-in through hole, so that the flip cover is in a closed state, and the elastic stopper of the bottom shell abuts against the first stopper. Since the bottom of the first stopper forms a height difference with the side of the flip axis, when the flip cover is not subjected to external force, the flip cover is fixedly closed on the plug-in through hole by the elastic stopper and the first stopper, thereby ensuring that the flip cover can continue to cover the plug-in through hole.

[0022] When the flip cover is subjected to an external force and flips relative to the upper cover and the bottom shell, switching the flip cover from the closed state to the open state, the side of the rotation axis of the flip cover abuts against the elastic limiting member, causing a certain elastic deformation of the elastic limiting member. If the external force for flipping the flip cover is lost at this time, the restoring force of the elastic limiting member drives the rotation axis to rotate in the opposite direction, causing the flip cover to automatically return to the closed state. Furthermore, when the dust-proof cover is accidentally opened, the dust-proof cover can automatically return to the closed state, thus ensuring the dust-proof effect of the dust-proof cover on the insertion through-hole.

[0023] When the flip cover is in the open state, at this time the dust-proof cover is opened so that the gas cannula can be inserted into the insertion through-hole and the gas cannula is communicated with the jack of the gas terminal. At this time, since the elastic limiting member abuts against the second limiting portion and there is a height difference between the bottom of the second limiting portion and the side of the rotation axis of the flip cover, the flip cover can remain fixed and always in the open state when not subjected to an external force. Furthermore, it is ensured that when the gas cannula is not inserted, the flip cover will not flip relative to each other and re-cover the insertion through-hole, effectively avoiding the interference of the dust-proof cover on the work of medical staff.

[0024] Therefore, through the cooperation of the elastic limiting member and the first limiting portion and the second limiting portion, the stability of the dust-proof cover in the closed state or in the open state is ensured. Thus, while effectively ensuring the dust-proof effect of the dust-proof cover on the insertion through-hole, the accidental opening or closing of the dust-proof cover caused by misoperation is reduced, effectively improving the convenience and safety when the dust-proof cover is used. Description of the Drawings

[0025] Figure 1 is a perspective structural schematic diagram of the dust-proof cover of the present utility model in the closed state;

[0026] Figure 2 is a perspective structural schematic diagram of the dust-proof cover of the present utility model in the open state;

[0027] Figure 3 is a bottom view structural schematic diagram of the dust-proof cover of the present utility model;

[0028] Figure 4 is a connection structural schematic diagram between the flip cover and the bottom shell when the dust-proof cover of the present utility model is in the closed state;

[0029] Figure 5 is a connection structural schematic diagram between the flip cover and the bottom shell when the dust-proof cover of the present utility model is in the open state;

[0030] Figure 6 is Figure 5 an enlarged structural schematic diagram of part A in Detailed Embodiment

[0031] To make the objectives, technical solutions and advantages of the present utility model more clear, the present utility model will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the orientation terms such as upper, lower, left, right, front, rear, inner and outer that appear or will appear in the text of the present utility model are only based on the accompanying drawings of the present utility model, and they do not specifically limit the present utility model.

[0032] The dust cover provided by the present utility model can effectively ensure the dust-proof effect of the dust cover on the insertion through hole 21, while reducing the accidental opening or closing of the dust cover caused by misoperation, and effectively improving the convenience and safety of the dust cover during use.

[0033] In an embodiment of the present utility model, as Figures 1 to 5 shown, the dust cover includes a bottom shell 1, an upper cover 2 and a flip cover 3. The upper cover 2 is detachably connected to the bottom shell 1. The upper cover 2 is formed with an insertion through hole 21, and the insertion through hole 21 penetrates through the upper cover 2 and the bottom shell 1. The flip cover 3 is provided with a flip shaft 31. The side surface of the flip shaft 31 is spaced with a first limiting portion 311 and a second limiting portion 312. The bottom of the first limiting portion 311 and the bottom of the second limiting portion 312 both form a height difference with the side surface of the flip shaft 31. The bottom shell 1 is formed with an elastic limiting member 11. The flip cover 3 is pivotally connected to the bottom shell 1 and the upper cover 2 through the flip shaft 31, so that the flip cover 3 can be switched between a closed state and an open state; wherein, in the closed state, the flip cover 3 covers the insertion through hole 21, and the elastic limiting member 11 abuts against the first limiting portion 311. In the open state, the elastic limiting member 11 abuts against the second limiting portion 312.

[0034] According to the dust cover provided by this embodiment, after inserting the bottom shell 1 of the dust cover into the jack of the gas terminal, when it is necessary to use the dust cover to prevent dust from entering the jack, the flip cover 3 is covered on the insertion through hole 21, so that the flip cover 3 is in the closed state, and the elastic limiting member 11 of the bottom shell 1 abuts against the first limiting portion 311. Since the bottom of the first limiting portion 311 forms a height difference with the side surface of the flip shaft 31, when the flip cover 3 is not affected by an external force, the flip cover 3 is limited and fixed to cover the insertion through hole 21 through the elastic limiting member 11 and the first limiting portion 311, thereby ensuring that the flip cover 3 can continuously cover the insertion through hole 21.

[0035] When the flip cover 3 is flipped relative to the upper cover 2 and the bottom shell 1 under the action of an external force and is switched from the closed state to the open state, the side surface of the flip shaft 31 abuts against the elastic limiting member 11, causing the elastic limiting member 11 to undergo a certain elastic deformation. If the flip cover 3 loses the external force for flipping at this time, the restoring force of the elastic limiting member 11 drives the flip shaft 31 to rotate in the opposite direction, so that the flip cover 3 automatically returns to the closed state. Furthermore, when the dust cover is accidentally opened, the dust cover can automatically return to the closed state, thus ensuring the dust-proof effect of the dust cover on the insertion through hole 21.

[0036] When the flip cover 3 is in the open state, the dust cover is opened so that the gas cannula can be inserted into the insertion through hole 21, and the gas cannula is communicated with the jack of the gas terminal. At this time, since the elastic limiting member 11 abuts against the second limiting portion 312, and there is a height difference between the bottom of the second limiting portion 312 and the side surface of the rotation axis 31 of the flip cover 3, the flip cover 3 can be fixed and always in the open state when not affected by external forces. Furthermore, it is ensured that when the gas cannula is not inserted, the flip cover 3 will not flip relative to each other and cover the insertion through hole 21 again, effectively avoiding the interference of the dust cover to the work of medical staff.

[0037] Therefore, through the cooperation of the elastic limiting member 11 and the first limiting portion 311 and the second limiting portion 312, the stability of the dust cover in the closed state or in the open state is ensured. Thus, while effectively ensuring the dust-proof effect of the dust cover on the insertion through hole 21, the accidental opening or closing of the dust cover caused by misoperation is reduced, and the convenience and safety of using the dust cover are effectively improved.

[0038] Among them, the first limiting portion 311 and the second limiting portion 312 form a predetermined angle on the rotation axis 31 of the flip cover 3. Preferably, the predetermined angle between the first limiting portion 311 and the second limiting portion 312 is 180°, so that when the flip cover 3 is switched from the closed state to the open state, the flip cover 3 can be flipped 180°, ensuring that the dust cover can be fully opened and avoiding interference with the insertion of the gas cannula when the dust cover is in the open state.

[0039] Specifically, to ensure that there is a height difference between the bottom of the first limiting portion 311 and the bottom of the second limiting portion 312 and the side surface of the rotation axis 31 of the flip cover 3, as Figures 4 to 6 shown, in this embodiment, both the first limiting portion 311 and the second limiting portion 312 are concave arc surfaces, and the elastic limiting member 11 is adapted to abut against the concave arc surfaces.

[0040] Furthermore, when the flip cover 3 is in the closed state, the first limiting portion 311, which is a concave arc surface, can limit the movement range of the elastic limiting member 11, and a stable locking state is formed between the elastic limiting member 11 and the first limiting portion 311, so that the flip cover 3 can be stably closed on the insertion through hole 21, ensuring the dust-proof effect of the dust cover on the insertion through hole 21.

[0041] During the process of the flip cover 3 being switched from the closed state to the open state under the action of an external force, the side surface of the flip cover 3 abuts against the elastic limiting member 11, causing the elastic limiting member 11 to undergo elastic deformation to adapt to the flipping of the flip cover 3. At this time, the elastic limiting member 11 will form a certain rebound resistance to the flip cover 3.

[0042] When the flip cover 3 is completely switched to the open state, the second limiting portion 312, which is an inward concave arc surface, abuts against the elastic limiting member 11, causing the elastic limiting member 11 to rebound. At this time, the rebound resistance of the elastic limiting member 11 to the flip cover 3 disappears. By restricting the movement range of the elastic limiting member 11 through the second limiting portion 312, a stable locking state is formed between the elastic limiting member 11 and the second limiting portion 312 to ensure that the flip cover 3 is stably in the open state.

[0043] Through the abutting cooperation between the elastic limiting member 11 and the inward concave arc surface and the side surface of the rotation shaft 31, the medical staff can feel the resistance of the elastic limiting member 11 when opening the flip cover 3. If the medical staff accidentally opens the flip cover 3 at this time, feedback can be given to the medical staff through the resistance of the elastic limiting member 11, thus avoiding the dust cover being opened due to misoperation. At the same time, through the cooperation between the elastic limiting member 11 and the two inward concave arc surfaces, the medical staff can obtain a certain rebound resistance feedback when opening the dust cover, which is convenient for the medical staff to judge the open state of the dust cover.

[0044] It should be noted here that in other embodiments of the present invention, the first limiting portion 311 and the second limiting portion 312 are not limited to the inward concave arc surface. The first limiting portion 311 and the second limiting portion 312 can also be outward convex arc surfaces, and the rotation shaft 31 is limited by the outward convex arc surface to ensure the stability of the dust cover in the closed state or the open state.

[0045] Furthermore, as Figures 4 to 6 shown, the bottom shell 1 is formed with a connecting convex column 12. The connecting convex column 12 is provided with a rotating hole 121. The rotation shaft 31 passes through the rotating hole 121 and is rotatably connected to the rotating hole 121 to limit the rotation range and rotation position of the rotation shaft 31 through the rotating hole 121. The elastic limiting member 11 is an elastic rib. The elastic rib is formed on the side wall of the connecting convex column 12, and the upper end of the elastic rib protrudes from the rotating hole 121.

[0046] It can be understood that since the upper end of the elastic rib protrudes from the rotating hole 121, when the flip cover 3 is in the closed state or the open state, the upper end of the elastic rib can abut against the inward concave arc surface to ensure that the flip cover 3 is stably in the closed state or the open state. During the rotation of the rotation shaft 31, when the elastic rib is gradually released from the inward concave arc surface of the first limiting portion 311 and abuts against the side surface of the rotation shaft 31 at a certain stage, the elastic rib is bent to a certain extent. At the same time, the flip cover 3 receives the rebound resistance of the elastic rib, affecting the opening and closing process of the flip cover 3 and providing a certain sense of resistance for the medical staff.

[0047] Of course, the elastic limiter 11 is not limited to the elastic rib structure. In other embodiments of the present invention, the elastic limiter 11 can also be a limiter boss, the limiter boss and the connecting boss 12 are arranged along the extension direction of the flip axis 31, and the limiter boss is connected to the bottom shell 1 through an elastic member. The elastic member is preferably a compression spring.

[0048] In the closed state and the open state, the upper end of the limiting convex column is higher than the bottom of the rotating hole 121 to ensure that the upper end of the limiting convex column can abut against the inner concave arc surface of the flip shaft 31, ensuring that the flip cover 3 is stably in the closed state and the open state. When the flip cover 3 rotates, the upper end of the limiting convex column breaks away from the inner concave arc surface and abuts against the side of the flip shaft 31. Under the action of the side of the flip shaft 31, the limiting convex column compresses the elastic member to adapt to the flipping of the flip cover 3; when the flip cover 3 rotates to the inner concave arc surface of the second limiting portion 312, the elastic member rebounds, so that the limiting convex column abuts against the inner concave arc surface to fix the flip cover 3 in the open state.

[0049] In the embodiments of the present invention, Figure 2 As shown, the plug-in through hole 21 is formed with a first inner wall surface 211 and a second inner wall surface 212, the first inner wall surface 211 is located on the upper cover 2, and the second inner wall surface 212 is located on the bottom shell 1. The side wall of the flip cover 3 is formed with a first inclined surface 32, and the first inner wall surface 211 of the plug-in through hole 21 is formed with a second inclined surface 22, and in the closed state, the first inclined surface 32 abuts against the second inclined surface 22.

[0050] It can be understood that by abutting the first inclined surface 32 against the second inclined surface 22, the inclined surface is used to guide the flip cover 3 so that it can be positioned at the correct position when covering the plug-in through hole 21, so that the mating surfaces between the flip cover 3 and the upper cover 2 are aligned, thereby reducing the mating clearance between the flip cover 3 and the upper cover 2, improving the sealing degree between the flip cover 3 and the upper cover 2, and effectively enhancing the dustproof effect of the dustproof cover on the plug-in through hole 21.

[0051] Furthermore, if Figure 2 As shown, a step hole 23 is formed on the side of the upper cover 2 facing away from the bottom shell 1, the step hole 23 is coaxial with the plug-in through hole 21, and the second inclined surface 22 is formed on the side wall of the step hole 23. Furthermore, when the flip cover 3 is covered on the upper cover 2, the edge of the lower side of the flip cover 3 is located at the step hole 23, ensuring that the lower side of the flip cover 3 can completely cover the plug-in through hole 21, further enhancing the dustproof effect of the dustproof cover on the plug-in through hole 21.

[0052] In another embodiment, in order to ensure the sealing effect between the flip cover 3 and the upper cover 2 , a sealing ring is provided on the second inclined surface 22 , and in the closed state, the sealing ring is tightly attached to the first inclined surface 32 .

[0053] It can be understood that when the flip cover 3 is closed on the upper cover 2, the sealing ring closely adheres to the first inclined surface 32 and the second inclined surface 22 to fill the tiny gap existing between the first inclined surface 32 and the second inclined surface 22, thereby further preventing dust in the external environment from entering the inside of the insertion through hole 21 through the tiny gap, and further ensuring the dust-proof effect and sealing effect of the dust-proof cover on the insertion through hole 21.

[0054] In another embodiment, to further ensure that the flip cover 3 can be stably closed on the upper cover 2, a first magnetic attracting member is provided on the first inclined surface 32, and a second magnetic attracting member is provided on the second inclined surface 22. In the closed state, the first magnetic attracting member and the second magnetic attracting member are magnetically connected. Furthermore, when the flip cover 3 is closed on the upper cover 2, the first inclined surface 32 and the second inclined surface 22 are magnetically connected through the first magnetic attracting member and the second magnetic attracting member to ensure that the flip cover 3 can be stably closed on the upper cover 2, and to prevent the flip cover 3 from being opened due to vibration or an accidentally applied external force, which may affect the dust-proof effect of the dust-proof cover.

[0055] Preferably, in this embodiment, both the first magnetic attracting member and the second magnetic attracting member are permanent magnets. The first magnetic attracting member is provided at one end of the flip cover 3 close to the avoidance notch 24, and the second magnetic attracting member is provided at a position on the upper cover 2 close to the avoidance notch 24. Of course, the number and position of the first magnetic attracting member can be set as needed, and the number and position of the second magnetic attracting member are correspondingly set according to the number and position of the first magnetic attracting member.

[0056] In the embodiment of the present utility model, as Figure 1 and Figure 2 shown, the upper cover 2 is provided with an avoidance notch 24. When it is necessary to switch the flip cover 3 from the closed state to the open state, an external force can be applied to the flip cover 3 through the avoidance notch 24 to drive the flip cover 3 to flip, thereby opening the flip cover 3. By providing a space for opening the flip cover 3 through the avoidance notch 24, the convenience for medical staff to open the flip cover 3 is effectively improved, and the usability of the dust-proof cover is increased.

[0057] In the embodiment of the present utility model, to achieve a detachable connection between the upper cover 2 and the bottom shell 1, as Figure 3 shown, one of the upper cover 2 and the bottom shell 1 is provided with a plurality of bosses 25, and the other of the upper cover 2 and the bottom shell 1 is provided with a plurality of grooves 13. The bosses 25 are inserted into the corresponding grooves 13 to enable a detachable connection between the upper cover 2 and the bottom shell 1. Furthermore, when connecting the upper cover 2 and the bottom shell 1, it is only necessary to insert the plurality of bosses 25 into the corresponding grooves 13, without the need to use additional tools or other complex operations to connect the upper cover 2 and the bottom shell 1, effectively simplifying the installation process between the upper cover 2 and the bottom shell 1 and improving the connection efficiency between the two.

[0058] The present utility model further provides a medical gas terminal. The medical gas terminal includes a device body and the dust-proof cover described in any one of the above embodiments. The device body is provided with a mounting hole, and the dust-proof cover is inserted into the mounting hole.

[0059] When medical staff needs to connect a gas cannula to the medical gas terminal, the flip cover 3 of the dust-proof cover can be switched from the closed state to the open state, so as to insert the gas cannula into the insertion through hole 21 to connect the gas cannula and the medical gas terminal. After the gas cannula is pulled out from the medical gas terminal, the flip cover 3 is switched from the open state to the closed state, and the dust-proof cover is used to prevent dust from entering the jack, avoiding the jack being exposed and accumulating dust.

[0060] It should be noted here that the internal gas source of the medical gas terminal can be an oxygen source or a hydrogen source, etc., which can be determined according to actual needs.

[0061] The above is the preferred embodiment of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present utility model.

Claims

1. A dust cover, characterized in that, include: Bottom shell; An upper cover is detachably connected to the bottom shell, and the upper cover is formed with a plug-in through hole, and the plug-in through hole runs through the upper cover and the bottom shell; A flip cover, wherein the flip cover is provided with a flip shaft, and a first limiting portion and a second limiting portion are arranged at intervals on the side of the flip shaft, and the bottom of the first limiting portion and the bottom of the second limiting portion both form a height difference with the side of the flip shaft; The bottom shell is formed with an elastic limiter, and the flip cover is flip-connected to the bottom shell and the upper cover via the flip axis so that the flip cover can be switched between a closed state and an open state; wherein, in the closed state, the flip cover covers the plug-in through hole, and the elastic limiter abuts against the first limiter, and in the open state, the elastic limiter abuts against the second limiter.

2. The dust cover according to claim 1, characterized in that The first limiting portion and the second limiting portion are both concave arc surfaces, and the elastic limiting member is suitable for abutting against the concave arc surfaces.

3. The dust cover according to claim 2, characterized in that The bottom shell is formed with a connecting boss, the connecting boss is provided with a rotating hole, the flip shaft is passed through the rotating hole, and the flip shaft is rotatably connected to the rotating hole; the elastic limiting member is an elastic rib, the elastic rib is formed on the side wall of the connecting boss, and the upper end of the elastic rib protrudes from the rotating hole.

4. The dust cover according to claim 1, characterized in that The plug-in through hole is formed with a first inner wall surface and a second inner wall surface, the first inner wall surface is located on the upper cover, and the second inner wall surface is located on the bottom shell; The side wall of the flip cover is formed with a first inclined surface, and the first inner wall surface of the plug-in through hole is formed with a second inclined surface. In the closed state, the first inclined surface abuts against the second inclined surface.

5. The dust cover according to claim 4, characterized in that, A step hole is formed on a side of the upper cover away from the bottom shell, the step hole is coaxial with the plug-in through hole, and the second inclined surface is formed on a side wall surface of the step hole.

6. The dust cover according to claim 4, characterized in that, The first inclined surface is provided with a first magnetic attraction component, and the second inclined surface is provided with a second magnetic attraction component. In the covered state, the first magnetic attraction component and the second magnetic attraction component are magnetically connected.

7. The dust cover according to claim 4, characterized in that, The second inclined surface is provided with a sealing ring, and in the covering state, the sealing ring is tightly attached to the first inclined surface.

8. The dust cover according to any one of claims 1 to 7, characterized in that, The upper cover is provided with an avoidance notch.

9. The dust cover according to any one of claims 1 to 7, characterized in that, One of the upper cover and the bottom shell is provided with a plurality of bosses, and the other of the upper cover and the bottom shell is provided with a plurality of grooves, and the bosses are inserted into the corresponding grooves so that the upper cover and the bottom shell are snap-connected.

10. A medical gas terminal, characterized in that, The medical gas terminal comprises an equipment body and the dust cover according to any one of claims 1 to 9, the equipment body is provided with a mounting hole, and the dust cover is inserted into the mounting hole.

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