Air path adjustment mechanism and oxygen supply device

Abstract

The utility model discloses a kind of gas path adjusting mechanism and oxygen supply device, gas path adjusting mechanism is used in gas supply device, gas supply device mainly refers to oxygen supply device.The gas path adjusting mechanism includes adjusting piece, the gas supply device is equipped with several gas paths, several through holes are equipped on the adjusting piece, the through hole is cooperated with different gas paths by moving the adjusting piece.It also includes supporting piece, the outer surface of the adjusting piece is equipped with several supporting grooves matched with the supporting piece, the supporting piece is switched between each supporting groove by moving the supporting piece.The utility model is switched between different supporting grooves by the setting of supporting piece and several supporting grooves, in the process of operator bare-handedly moving adjusting piece, supporting piece will switch, and vibration feeling brought by switching can be transmitted to operator, operator can clearly understand whether gas path adjusting mechanism is adjusted in place.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a gas path regulating mechanism and an oxygen supply device. Background Technology

[0002] An oxygen concentrator is a device that can separate oxygen from ambient air to provide a stable, high-concentration oxygen supply for users who need oxygen therapy.

[0003] Oxygen concentrators typically have two modes. The first mode is pulse mode, where the user inhales through the mouthpiece, and oxygen enters the body through the mouthpiece; when the user does not inhale, oxygen does not flow into the mouthpiece. The second mode is continuous flow mode, where oxygen flows into the mouthpiece regardless of whether the user inhales. Switching between pulse and continuous flow modes is primarily achieved through an airflow adjustment mechanism with multiple orifices. By operating this mechanism, the airflow path of the oxygen concentrator changes, thus switching between pulse and continuous flow modes.

[0004] However, existing gas path regulating mechanisms do not have operator feedback devices during operation. When the regulating element switches from pulse mode to continuous flow mode, there is no vibration sensation given to the operator, and the operator has no way of knowing whether the gas path regulating mechanism has been adjusted properly. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model discloses an air path adjustment mechanism and an oxygen supply device, which provides a vibration sensation to the user when using the air path adjustment mechanism.

[0006] The objective of this utility model is achieved through the following technical solution: A gas path adjustment mechanism is used in a gas supply device; the gas path adjustment mechanism includes an adjustment member, the gas supply device has a plurality of gas paths, the adjustment member has a plurality of through holes, and the adjustment member can be moved so that the through holes cooperate with different gas paths; it also includes a support member, the outer surface of the adjustment member has a plurality of support grooves that cooperate with the support member, and the support member can be moved so that the support member switches between the support grooves.

[0007] Furthermore, the adjusting member is an adjusting ring, the through hole extends from the first surface of the adjusting ring to the second surface of the adjusting ring, the first surface and the second surface are arranged opposite to each other, the adjusting ring is provided with a through hole, the abutting groove is provided on the inner wall of the through hole, and the abutting member is disposed in the through hole.

[0008] Furthermore, the abutment includes two abutment balls symmetrically arranged with the adjusting ring as the center, and the two abutment balls are connected by an elastic element; the abutment also includes a limiting element that restricts the elastic element from rotating with the adjusting ring.

[0009] Furthermore, the elastic element is a spring, and the limiting element is a fixing block disposed within the through hole of the adjusting ring; the adjusting element rotates around the fixing block, and the fixing block is provided with a through hole through which the spring passes.

[0010] An oxygen supply device includes a housing with a receiving cavity and a suction nozzle disposed on the housing; and an air path regulating mechanism including any of the above-mentioned regulating rings, wherein a rotating ring is sleeved on the outside of the housing and the rotating ring is fixedly connected to the regulating ring.

[0011] Furthermore, a scale is provided on the outer wall of the rotating ring, and a pointer is provided on the housing to cooperate with the scale.

[0012] Furthermore, each of the aforementioned support grooves is arranged sequentially and adjacently around the inner wall of the through hole.

[0013] Furthermore, the rotating ring is provided with a connecting hole, the outer wall of the adjusting ring is provided with a threaded hole, and a stud is fitted inside the connecting hole and the threaded hole.

[0014] Furthermore, a plurality of the through holes form a first through hole group, wherein the through holes in the first through hole group are used to communicate with the suction nozzle; in the first through hole group, the diameter of each through hole gradually increases sequentially.

[0015] Furthermore, a plurality of the through holes form a second through hole group, and a first air passage is provided in the receiving cavity, the first air passage being connected to the suction nozzle; by rotating the rotating ring, the through holes in the first through hole group or the through holes in the second through hole group are connected to the first air passage; the second through hole group is located on the side of the through hole with the smallest diameter in the first through hole group, and the diameter of each through hole in the second through hole group gradually increases as it moves away from the first through hole group.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting up the abutment and several abutment grooves, when the operator moves the adjustment component by hand, the abutment will switch between different abutment grooves, and the vibration caused by the switching will be transmitted to the operator, so the operator can clearly understand whether the air path adjustment mechanism is adjusted in place. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the adjusting ring of this utility model; Figure 2This is the first front view of the rotating ring and the air passage adjustment mechanism in this utility model; Figure 3 yes Figure 2 Sectional view of section AA; Figure 4 This is the second front view of the rotating ring and the air passage adjustment mechanism in this utility model; Figure 5 yes Figure 4 Sectional view of section BB; Figure 6 This is a three-dimensional schematic diagram of the rotating ring and the air passage adjustment mechanism in this utility model; Figure 7 This is the front view of the oxygen supply device; Figure 8 yes Figure 7 A sectional view of section C-C; Figure 9 yes Figure 7 Sectional view of section DD; Figure 10 This is a front view of the adjusting ring of this utility model; Figure 11 yes Figure 8 Enlarged schematic diagram of section E in the middle.

[0018] In the picture: 1-Supporting groove; 2-Adjusting ring; 3-Supporting ball; 4-Spring; 5-Fixing block; 6-Housing shell; 7-Suction nozzle; 8-Rotating ring; 9-Connecting hole; 10-Stud; 11-First through hole group; 12-Second through hole group; 13-First air passage; 14-First air chamber; 15-Second air chamber; 16-Third air chamber; 17-Deformation membrane; 18-Second air passage; 19-Third air passage; 20-Third through hole group; 21-Ventilation groove. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] This utility model discloses a gas path regulating mechanism for use in a gas supply device. The gas supply device mainly refers to an oxygen supply device, i.e., an oxygen concentrator. An oxygen supply device is connected to an oxygen cylinder and can depressurize the high-pressure oxygen in the cylinder to provide oxygen to the user. Besides being used in oxygen supply devices, the gas path regulating mechanism of this utility model can also be used in other gas supply devices, such as anesthesia machines.

[0023] The following section describes in detail the structure of the gas path regulating mechanism and the oxygen supply device, using the example of its use in an oxygen supply system.

[0024] like Figure 1 As shown, the gas path adjustment mechanism includes an adjusting component, and the oxygen supply device has several gas paths. The adjusting component has several through holes, and the adjusting component moves so that the through holes cooperate with different gas paths. That is, in the oxygen supply device, the moving adjusting component can switch between pulse mode and continuous flow mode.

[0025] The gas path adjustment mechanism also includes a supporting member, the outer surface of which has several supporting grooves 1 that mate with the supporting member. When the operator moves the supporting member manually, as it switches between the supporting grooves 1, the through hole mates with different gas paths, thus changing the gas path direction within the oxygen supply device. During this process, because each supporting groove 1 has a bottom and an edge, the supporting member undergoes elastic deformation as it moves from the bottom of one groove 1 to the bottom of another. Since the supporting member always rests against the surface of the supporting groove 1, the force generated by this elastic deformation is transmitted to the adjusting member with the supporting groove 1, and thus to the operator. The mechanism is designed so that when the supporting member is at the bottom of the supporting groove 1, the through hole mates with the gas path within the oxygen supply device. Therefore, the operator can clearly feel the adjustment during movement of the adjusting member and understand whether the gas path adjustment mechanism is properly adjusted.

[0026] In the gas path regulating mechanism and oxygen supply device of this utility model, many technical features such as the structure of the regulating member and the structure of the supporting member have multiple implementations. Below, for each of these technical features, one implementation is mainly selected for detailed description, and the embodiment in which this implementation is located is referred to as this embodiment. Other implementations of the numerous features such as the structure of the regulating member are referred to as other embodiments, which are briefly described below.

[0027] In this embodiment, as Figure 1 As shown, the adjusting component is an adjusting ring 2, with a through hole extending from the first surface of the adjusting ring 2 to its second surface, which are opposite to each other. The adjusting ring has a through hole, i.e., a circular hole inside the adjusting ring, with the center of the circular hole concentric with the outer ring of the adjusting ring. A retaining groove 1 is provided on the inner wall of the through hole, and a retaining component is disposed within the through hole. This utility model, by setting the adjusting component in a ring shape and having the through hole penetrating both opposite surfaces of the adjusting ring 2, facilitates the processing of the through hole. Furthermore, placing the retaining component within the through hole effectively reduces the volume of the air passage adjusting mechanism. In other embodiments, the adjusting component can also be set in a strip shape, with each retaining groove 1 located on one side of the adjusting component, and the retaining component being columnar, with one end of the retaining component abutting against the inner wall surface of the retaining groove 1.

[0028] In this embodiment, as Figure 2 and Figure 3As shown, the abutment includes two abutment balls 3 symmetrically arranged around the adjusting ring 2, connected by an elastic element. The abutment groove 1 is an arc-shaped groove that mates with the abutment balls 3. The abutment also includes a limiting element that restricts the rotation of the elastic element with the adjusting ring 2. When the operator rotates the adjusting ring 2, the elastic element deforms, and the abutment balls 3 roll into other abutment grooves 1. This invention, through the arrangement of the abutment balls 3, utilizes the arc surface of the abutment balls 3 to facilitate the switching of the abutment between different abutment grooves 1. In other embodiments, the abutment can also be a spring clip, with the radial cross-section of the abutment groove 1 being triangular. When the spring clip switches between different abutment grooves 1, it will make a clicking sound, allowing the operator to know whether the spring clip is engaged in the abutment groove 1.

[0029] In this embodiment, as Figures 2 to 5 As shown, the elastic element is a spring 4, and the limiting element is a fixing block 5 disposed within the through hole of the adjusting ring 2. The fixing block 5 is fixed to other components with air passages in the oxygen supply device, and a through hole for the spring 4 to pass through is provided in the fixing block 5. Therefore, when the adjusting ring 2 rotates around the fixing block 5, the spring 4 will only be compressed radially, and the spring 4 will not rotate with the adjusting ring 2. Through the arrangement of the spring 4 and the fixing block 5, the spring 4 will only undergo axial deformation, making it less prone to breakage due to rotation with the adjusting ring 2, thus giving the supporting element high reliability. In other embodiments, the supporting element can also be a spring sheet. Although spring sheets have a simple structure and low cost, their reliability is relatively poor.

[0030] In this embodiment, as Figures 6 to 9 As shown, the oxygen supply device of this utility model, in addition to the gas path adjustment mechanism, also includes a housing 6 with a receiving cavity and a suction nozzle 7 disposed on the housing 6. Several gas paths are provided within the receiving cavity. Oxygen flows into the gas paths within the receiving cavity through the through hole on the adjustment ring 2, and finally flows into the suction nozzle 7. A rotating ring 8 is fitted around the outside of the housing 6, and the rotating ring 8 is fixedly connected to the adjustment ring 2. Because the adjustment ring 2 has a through hole for transmitting oxygen, the adjustment ring 2 is also located within the receiving cavity. The rotating ring 8 is provided to facilitate the rotation of the adjustment ring 2 and to protect it from damage. The operator rotates the rotating ring 8 by hand, causing the adjustment ring 2 to rotate, thus switching the oxygen supply device between pulse mode and continuous flow mode. In other embodiments, the rotating ring 8 may be omitted, and the operator can directly rotate the adjustment ring 2 by hand.

[0031] In this embodiment, as Figure 7 As shown, a scale is provided on the outer wall of the rotating ring 8, and a pointer is provided on the housing 6 to cooperate with the scale. For example, the scale may have two divisions: one division indicating pulse mode and the other indicating continuous flow mode, allowing the operator to clearly understand the operating mode of the oxygen supply device. In other embodiments, several indicator lights can also be provided on the housing 6; rotating the rotating ring 8 will illuminate different indicator lights.

[0032] In this embodiment, as Figure 1 As shown, each abutment groove 1 is arranged adjacent to each other around the inner wall of the through hole of the adjusting ring 2. Therefore, each abutment groove 1 is continuously arranged. There are no large non-groove areas between each abutment groove 1. During the movement of the abutment ball 3 between each abutment groove 1, the movement of the abutment ball 3 from one abutment groove 1 to the next is smooth and continuous. The operator experiences a series of uniform, fine "clicks," and the feel is smooth. In other embodiments, each abutment groove 1 may also be arranged at intervals.

[0033] In this embodiment, as Figure 4 and Figure 5 As shown, the rotating ring 8 has a connecting hole 9, and the outer wall of the adjusting ring 2 has a threaded hole. A stud 10 is fitted into both the connecting hole 9 and the threaded hole. Therefore, during the assembly of the adjusting ring 2 and the rotating ring 8, the stud 10 is simply passed through the connecting hole 9 to achieve a threaded fit with the threaded hole. This invention facilitates the assembly and disassembly of the adjusting ring 2 and the rotating ring 8 through the stud 10 and the threaded hole. In other embodiments, the adjusting ring 2 and the rotating ring 8 can also be connected by welding.

[0034] In this embodiment, as Figure 1 and Figure 10 As shown, several through holes form a first through-hole group 11. In the first through-hole group 11, the diameter of each through hole gradually increases. Oxygen is designed to be transmitted through the through holes in the first through-hole group 11 and eventually flow into the suction nozzle 7. Only one through hole in the first through-hole group 11 connects to the suction nozzle 7 at any given time. Therefore, the increase in the diameter of the through holes increases the oxygen flow rate in the suction nozzle 7. This invention, through the arrangement of the first through-hole group 11, achieves the function of adjusting the oxygen supply level when the adjusting ring 2 is rotated to match the through holes of different diameters with the gas path in the oxygen supply device. In other embodiments, only one through hole may be provided to connect to the suction nozzle 7.

[0035] In this embodiment, as Figure 1 , Figure 8 and Figure 10 As shown, several through holes form a second through-hole group 12. A first air passage 13 is provided within the receiving cavity, and the first air passage 13 is connected to the suction nozzle 7. That is, the oxygen passing through the first air passage 13 will ultimately flow into the operator's mouth through the suction nozzle 7. Rotating the rotating ring 8 connects the through holes in the first through-hole group 11 or the through holes in the second through-hole group 12 to the first air passage 13. Since the oxygen supply device has two modes—pulse mode and continuous flow mode—it is set that when the through holes in the first through-hole group 11 are connected to the first air passage 13, the oxygen supply device is in pulse mode. It is set that when the through holes in the second through-hole group 12 are connected to the first air passage 13, the oxygen supply device is in continuous flow mode. Figure 10 As shown, the second through-hole group 12 is located on the side of the through-hole with the smallest diameter in the first through-hole group 11, and the diameter of each through-hole in the second through-hole group 12 gradually increases as it moves away from the first through-hole group 11. This invention, by arranging through-holes of different diameters in the first and second through-hole groups 11 and 12, ensures that the diameters of the through-holes in the first and second through-hole groups 11 and 12 are arranged sequentially from large to small, and then from small to large. This ensures that the oxygen flow rate in the suction nozzle 7 does not change significantly during the switching between pulse mode and continuous flow mode, achieving a smooth switching. In other embodiments, the through-holes in the first and second through-hole groups 11 and 12 can also be used in pulse mode, but the diameters of each through-hole in the first and second through-hole groups 11 and 12 are different. In other embodiments, the second through hole group 12 may be located on the side of the through hole with the largest diameter in the first through hole group 11, and the diameter of each through hole in the second through hole group 12 may gradually decrease as it moves away from the first through hole group 11.

[0036] The following describes in detail the gas path of the oxygen supply device in pulse mode and continuous flow mode in this embodiment. First, the detailed structure of the oxygen supply device is described: like Figure 8 , Figure 9 and Figure 11 As shown, the oxygen supply device has a first air chamber 14, a second air chamber 15, and a third air chamber 16 within its accommodating cavity. A deformation membrane 17 is provided between the first air chamber 14, the second air chamber 15, and the third air chamber 16. The deformation membrane 17 has a normal state and a deformed state. When the deformation membrane 17 is in the normal state, the first air chamber 14, the second air chamber 15, and the third air chamber 16 are separated by the deformation membrane 17 and isolated from each other. When the deformation membrane 17 is in the deformed state, the first air chamber 14 and the third air chamber 16 are interconnected, but both the first air chamber 14 and the third air chamber 16 are isolated from the second air chamber 15.

[0037] The receiving cavity also has a first air passage 13 connected to the first air chamber 14, a second air passage 18 connected to the second air chamber 15, and a third air passage 19 connected to the third air chamber 16. The third air passage 19 is also connected to the suction nozzle 7, and the second air passage 18 is connected to the suction nozzle 7. The second air passage 18 is equipped with an on / off valve. When the operator inhales into the suction nozzle 7, the on / off valve opens, and the second air passage 18 is open; when the oxygen supply device is not in use, the on / off valve closes.

[0038] The regulating ring 2 is provided with a first through hole group 11, a second through hole group 12, a third through hole group 20 and a long ventilation groove 21. The through holes in the first through hole group 11, the second through hole group 12 and the third through hole group 20 all penetrate the opposite sides of the regulating ring 2, and the long ventilation groove 21 is set towards the second air passage 18.

[0039] When the oxygen supply device needs to be controlled in pulse mode, rotate the adjusting ring 2 so that any through hole in the first through hole group 11 is connected to the first air passage 13, and any through hole in the third through hole group 20 is connected to the second air passage 18. At this time, the second through hole group 12, the ventilation slot 21, the first air passage 13, and the second air passage 18 are not connected to each other. Pressurized oxygen enters the first air chamber 14 through the first air passage 13, and simultaneously enters the second air chamber 15 through the second air passage 18. When the operator is not inhaling into the nozzle 7, the oxygen pressure in the first air chamber 14 and the second air chamber 15 is equal, so the deformable membrane 17 is in a normal state, the first air chamber 14 and the third air chamber 16 are separated from each other, and no oxygen flows out of the nozzle 7. When the operator inhales into the nozzle 7, the on / off valve opens, the oxygen pressure in the second chamber 15 decreases, and the oxygen pressure in the first chamber 14 becomes greater than that in the second chamber 15. The deformable membrane 17 is in a deformed state, and the first chamber 14 and the third chamber 16 become interconnected. Oxygen flows from the first chamber 14 into the third chamber 16 and then through the third air passage 19 into the nozzle 7. Simultaneously, oxygen also flows into the nozzle 7 through the second chamber 15 and the second air passage 18.

[0040] When the oxygen supply device needs to be controlled in continuous flow mode, rotate the adjusting ring 2 so that any through hole in the second through hole group 12 is connected to the first air passage 13, and the ventilation slot 21 is connected to the second air passage 18. The first through hole group 11, the second through hole group 12, the first air passage 13, and the second air passage 18 are not connected to each other. Pressurized oxygen enters the first air chamber 14 through the through hole in the second through hole group 12. The ventilation slot 21 is always connected to the outside air. Therefore, air at standard atmospheric pressure enters the second air chamber 15 through the second air passage 18. At this time, the air pressure in the first air chamber 14 is greater than the air pressure in the second air chamber 15, and the deformable membrane 17 is in a deformed state. Oxygen will flow into the suction nozzle 7 regardless of whether the operator inhales into it.

[0041] In summary, the gas path adjustment mechanism and oxygen supply device of this utility model, through the setting of the support groove 1 and the support member, allow the operator to clearly understand whether the gas path adjustment mechanism is adjusted in place during the movement of the adjustment member. Furthermore, by placing the support member inside the through hole, the volume of the gas path adjustment mechanism is effectively reduced. The setting of the support ball 3 facilitates the switching of the support member between different support grooves 1. The setting of the spring 4 and the fixing block 5 ensures high reliability of the support member. The setting of the rotating ring 8 protects the adjustment ring 2 from damage. The pointer on the housing 6, which cooperates with the scale, allows the operator to clearly understand the working mode of the oxygen supply device. The continuous arrangement of the support grooves 1 helps improve the operator's experience when rotating the adjustment ring 2. The setting of the first through hole group 11 realizes the function of adjusting the oxygen supply level. Furthermore, by setting the arrangement of different diameter through holes in the first through hole group 11 and the second through hole group 12, a smooth switching between pulse mode and continuous flow mode is achieved.

[0042] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A gas path adjustment mechanism for use in a gas supply device; the gas path adjustment mechanism includes an adjustment member, the gas supply device has a plurality of gas paths, the adjustment member has a plurality of through holes, and by moving the adjustment member, the through holes cooperate with different gas paths, characterized in that, It also includes a retaining member, and the outer surface of the adjusting member is provided with a plurality of retaining grooves (1) that cooperate with the retaining member. When the retaining member is moved, the retaining member switches between the retaining grooves (1).

2. The air path regulating mechanism according to claim 1, characterized in that, The adjusting member is an adjusting ring (2), the through hole extends from the first surface of the adjusting ring (2) to the second surface of the adjusting ring (2), the first surface and the second surface are arranged opposite to each other, the adjusting ring is provided with a through hole, the abutting groove (1) is provided on the inner wall of the through hole, and the abutting member is provided in the through hole.

3. The air path regulating mechanism according to claim 2, characterized in that, The abutment includes two abutment balls (3) symmetrically arranged with the adjusting ring (2) as the center, and the two abutment balls (3) are connected by an elastic element; the abutment also includes a limiting element that restricts the elastic element from rotating with the adjusting ring (2).

4. The air path regulating mechanism according to claim 3, characterized in that, The elastic element is a spring (4), and the limiting element is a fixing block (5) disposed in the through hole of the adjusting ring (2); the adjusting ring (2) rotates around the fixing block (5), and the fixing block (5) is provided with a through hole for the spring (4) to pass through.

5. An oxygen supply device, comprising a housing (6) having a receiving cavity and a suction nozzle (7) disposed on the housing (6), characterized in that, Includes the air path regulating mechanism as described in any one of claims 2 to 4, A rotating ring (8) is fitted on the outside of the housing (6), and the rotating ring (8) is fixedly connected to the adjusting ring (2).

6. The oxygen supply device according to claim 5, characterized in that, The outer wall of the rotating ring (8) is provided with a scale, and the housing (6) is provided with a pointer that cooperates with the scale.

7. The oxygen supply device according to claim 6, characterized in that, Each of the aforementioned support grooves (1) is arranged sequentially adjacent to each other around the inner wall of the through hole.

8. The oxygen supply device according to claim 5, characterized in that, The rotating ring (8) is provided with a connecting hole (9), the outer wall of the adjusting ring (2) is provided with a threaded hole, and a stud (10) is provided in the connecting hole (9) and the threaded hole.

9. The oxygen supply device according to claim 5, characterized in that, A plurality of the through holes form a first through hole group (11), wherein the through holes in the first through hole group (11) are used to communicate with the suction nozzle (7); in the first through hole group (11), the diameter of each through hole gradually increases in sequence.

10. The oxygen supply device according to claim 9, characterized in that, A plurality of the through holes form a second through hole group (12), and a first air passage (13) is provided in the receiving cavity. The first air passage (13) is connected to the suction nozzle (7). When the rotating ring (8) is rotated, the through holes in the first through hole group (11) or the through holes in the second through hole group (12) are connected to the first air passage (13). The second through hole group (12) is located on the side of the through hole with the smallest diameter in the first through hole group (11), and the diameter of each through hole in the second through hole group (12) gradually increases as it moves away from the first through hole group (11).

Images