CN219963779U

CN219963779U - Mask with oxygen supply interface and breather valve

Info

Publication number: CN219963779U
Application number: CN202320959630.6U
Authority: CN
Inventors: 刘健民; 常一鸣; 于航
Original assignee: China Oxygen Medical Technology Dalian Co ltd
Current assignee: China Oxygen Medical Technology Dalian Co ltd
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-11-07
Anticipated expiration: 2033-04-25

Abstract

The utility model discloses a mask with an oxygen supply interface and a breather valve, which comprises: mask, breather valve and oxygen supply plug; the breather valve is arranged on the mask and comprises a valve seat, a breather membrane and a valve cover; the valve seat comprises a baffle plate and a valve seat body, the valve seat body is provided with a valve seat exhaust hole, and the baffle plate is positioned in the valve seat exhaust hole; the valve cover comprises a mounting part and a valve cover body, wherein the valve cover body is provided with a valve cover exhaust hole, and the mounting part is positioned in the valve cover exhaust hole; an exhaust cavity is enclosed between the valve seat and the valve cover, and the valve seat exhaust hole and the valve cover exhaust hole are positioned at two ends of the exhaust cavity; the oxygen supply plug is provided with an air inlet pipe which is inserted into a jack arranged in the installation part, and an air inlet cavity which is internally provided with an inlet communicated air inlet pipe, an outlet communicated jack and faces the baffle; the breathing membrane is located the exhaust intracavity and overlaps and establish in the installation department periphery, and one side is the conflict face of contradicting with disk seat exhaust hole tip, leaves the clearance between conflict face and the baffle. The mask solves the problem that the normal oxygen inhalation of patients can not be realized while the existing mask is used for protecting virus infection.

Description

Mask with oxygen supply interface and breather valve

Technical Field

The utility model relates to the technical field of oxygen supply apparatuses, in particular to a mask with an oxygen supply interface and a breather valve.

Background

In order to avoid respiratory tract virus infection, the mask needs to be worn for a long time for personal protection, and patients with weak lung functions or people entering an anoxic environment need to perform high-flow oxygen inhalation through an oxygen supply device to prevent hypoxia. The oxygen inhalation needs to be carried out for a plurality of times and for a plurality of time periods every day, and for the patient needing oxygen inhalation, the mask needs to be taken off when the patient wears the oxygen inhalation mask, so that the possibility of the patient being infected by respiratory viruses is increased, and meanwhile, the patient is inconvenient to repeatedly wear and take off the special oxygen inhalation mask.

For patients who need oxygen inhalation, the normal oxygen inhalation is ensured while the respiratory tract virus infection is protected, so that the oxygen inhalation function is necessary to be integrated on a mask which is worn for a long time and has a protection function, and the existing mask does not have a structure which is quickly connected with oxygen supply equipment to realize oxygen supply, so that the requirements cannot be met.

Disclosure of Invention

The utility model provides a mask with an oxygen supply interface and a breather valve, which aims to solve the problem that the existing mask does not have a structure which is quickly connected with oxygen supply equipment to realize oxygen supply and can not ensure normal oxygen inhalation of a patient while protecting respiratory tract virus infection.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

a mask with an oxygen supply port and a breather valve, comprising: mask, breather valve and oxygen supply plug;

the breather valve is arranged on the mask and comprises a valve seat, a breather membrane and a valve cover buckled with the valve seat;

the valve seat comprises a baffle plate and a valve seat body which are fixedly connected with each other, a valve seat exhaust hole is formed in the valve seat body, and the baffle plate is positioned in the valve seat exhaust hole;

the valve cover comprises a mounting part and a valve cover body which are fixedly connected with each other, wherein the valve cover body is provided with a valve cover exhaust hole, and the mounting part is positioned in the valve cover exhaust hole;

an exhaust cavity is enclosed between the valve seat and the valve cover, and the valve seat exhaust hole and the valve cover exhaust hole are respectively positioned at two ends of the exhaust cavity;

the oxygen supply plug is provided with an air inlet pipe connected with oxygen supply equipment, the oxygen supply plug is inserted into a jack arranged in the installation part, the oxygen supply plug is internally provided with an air inlet cavity, the inlet of the air inlet cavity is communicated with the air inlet pipe, and the outlet of the air inlet cavity is communicated with the jack and faces the baffle;

the breathing membrane is located in the exhaust cavity and sleeved on the periphery of the mounting portion, one face of the breathing membrane is a collision face which is mutually collided with the end part of the valve seat exhaust hole, which is close to one end of the valve cover, and a gap for communicating the jack and the valve seat exhaust hole is reserved between the collision face and the baffle.

Furthermore, a plurality of radially distributed partition plates are arranged on one surface of the baffle plate, which is close to the oxygen supply plug.

Further, the oxygen supply plug further comprises an air inlet cylinder and a buckle, an air inlet cavity is arranged in the air inlet cylinder, an opening of the air inlet cylinder is an air inlet cavity outlet, and an air inlet cavity inlet is formed in the cylinder wall of one end, far away from the opening, of the air inlet cylinder;

the end part of the air inlet cylinder, which is provided with an opening end, is fixedly provided with a plurality of buckles distributed in a circular array around the axis of the air inlet cylinder, a gap is reserved between every two adjacent buckles, and the buckles are inserted into the jacks;

the air inlet pipe is arranged at one end of the air inlet cylinder far away from the opening.

Furthermore, an annular clamping groove coaxial with the jack is also formed in the mounting part, the annular clamping groove is formed in one end, close to the baffle, of the jack, the buckles are clamped with the mounting part through the annular clamping groove, and the buckles distributed in a circular array can rotate in the jack;

the inlet of the air inlet cavity is formed in the side wall of one end, far away from the opening, of the air inlet cylinder, and the axis of the air inlet pipe is perpendicular to the axis of the air inlet cylinder.

Further, the baffle is provided with a support column, and the support column is inserted into holes surrounded by a plurality of buckles distributed according to a circular array.

Further, the valve seat further comprises valve seat reinforcing ribs, the valve seat reinforcing ribs are radially distributed in the valve seat exhaust holes, one end of each valve seat reinforcing rib is fixed on the valve seat body, the other end of each valve seat reinforcing rib is fixed on one face, close to the abutting face, of the baffle, the valve seat reinforcing rib is close to the abutting face on one side of the valve cover, and a gap for communicating insertion holes and the valve seat exhaust holes is formed between the abutting face and the baffle.

Further, the valve cover further comprises valve cover reinforcing ribs, a plurality of valve cover reinforcing ribs are radially distributed in the valve cover exhaust holes, one end of each valve cover reinforcing rib is fixed on the valve cover body, and the other end of each valve cover reinforcing rib is fixed on the installation portion.

Further, the mounting portion further comprises a diaphragm protection plate, and the diaphragm protection plate is arranged at one end, far away from the valve seat, of the mounting portion.

Further, the valve cover is provided with a sealing ring, and the sealing ring is arranged between the valve cover and the oxygen supply plug.

The utility model has the beneficial effects that:

the utility model provides a mask with an oxygen supply interface and a breather valve, which comprises: the breathing valve is arranged on the mask;

the breathing membrane is arranged between the valve seat and the valve cover of the breathing valve, and the breathing membrane is mutually abutted with the valve seat exhaust hole, so that positive pressure of exhaust gas is blown off the breathing membrane when a patient exhales, waste gas in the mask is discharged, the stuffiness feeling during use is reduced, the breathing membrane is closed by negative pressure during inspiration, and pollutants sucked into the external environment are avoided;

the mounting part of the plug-in oxygen supply plug is arranged in the valve cover exhaust hole, the oxygen supply plug is provided with the air inlet cavity communicated with the air inlet pipe of the external oxygen supply equipment, and the outlet of the air inlet cavity faces the baffle in the valve seat exhaust hole, so that the discomfort of a patient caused by direct flushing of dry and cold oxygen fed by the oxygen supply equipment on the face of the patient is avoided;

the mask with the oxygen supply interface and the breather valve can be used as a common mask when oxygen inhalation is not needed, can be used by connecting the air inlet pipe with oxygen supply equipment when oxygen inhalation is needed, can provide protection for a patient, ensures normal oxygen inhalation, is convenient to use, and is more comfortable in oxygen inhalation experience of the patient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is an exploded view of a mask with oxygen supply port and breather valve of the present disclosure;

FIG. 2 is a schematic view of a valve seat of a mask with an oxygen supply port and a breather valve according to the present utility model;

FIG. 3 is a schematic view of the breathing membrane of the mask with the oxygen supply port and the breathing valve;

FIG. 4 is a schematic view of the structure of a valve cover of a mask with an oxygen supply port and a breather valve according to the present utility model;

FIG. 5 is a schematic view of the oxygen supply connector of the mask with the oxygen supply connector and the breathing valve;

FIG. 6 is a cross-sectional view of a mask with an oxygen supply port and a breather valve according to the present disclosure;

FIG. 7a is an enlarged view of FIG. 6 at A;

FIG. 7b is an oxygen flow diagram of FIG. 7 a;

FIG. 8 is an enlarged view of the oxygen supply fitting and seal ring of FIG. 7 a;

FIG. 9 is an enlarged view of the valve cover of FIG. 7 a;

fig. 10 is an enlarged view of the valve seat of fig. 7 a.

In the figure:

1. a mask;

2. a valve seat; 21. a valve seat exhaust hole; 22. a baffle; 221. a partition plate; 222. a support post; 23. valve seat reinforcing ribs; 24. annular reinforcing ribs; 25. a valve seat body;

3. a respiratory membrane;

4. a valve cover; 41. a valve cover exhaust hole; 42. a mounting part; 421. a jack; 422. an annular clamping groove; 423. a diaphragm guard plate; 43. valve cover reinforcing ribs; 44. a valve cover body;

5. a seal ring;

6. an oxygen supply joint; 61. an air inlet pipe; 62. an air inlet cylinder; 63. and (5) a buckle.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment provides a mask with an oxygen supply interface and a breather valve, as shown in fig. 1 and 6, including: mask 1, breather valve and oxygen supply plug 6;

the breather valve is arranged on the mask 1 and comprises a valve seat 2, a breather membrane 3 shown in figure 3 and a valve cover 4 buckled with the valve seat 2;

as shown in fig. 2, the valve seat 2 comprises a baffle plate 22 and a valve seat body 25 which are fixedly connected with each other, the valve seat body 25 is provided with a valve seat exhaust hole 21, and the baffle plate 22 is positioned in the valve seat exhaust hole 21;

as shown in fig. 4, the valve cover 4 includes a mounting portion 42 and a valve cover body 44 that are fixedly connected to each other, the valve cover body 44 is provided with a valve cover exhaust hole 41, and the mounting portion 42 is located in the valve cover exhaust hole 41;

an exhaust cavity is enclosed between the valve seat 2 and the valve cover 4, and the valve seat exhaust hole 21 and the valve cover exhaust hole 41 are respectively positioned at two ends of the exhaust cavity;

an air inlet pipe 61 connected with oxygen supply equipment is arranged on the oxygen supply plug 6, the oxygen supply plug 6 is inserted into a jack 421 arranged in the mounting part 42, an air inlet cavity is arranged in the oxygen supply plug 6, an inlet of the air inlet cavity is communicated with the air inlet pipe 61, and an outlet of the air inlet cavity is communicated with the jack 421 and faces the baffle 22;

the baffle 22 reduces the speed of the oxygen flowing in at a high speed, and the dry and cold oxygen sent by the oxygen supply equipment does not directly impact the face of the patient any more, but is diffused all around, so that the oxygen inhalation comfort is improved;

as shown in fig. 9, the breathing membrane 3 is located in the exhaust chamber and sleeved on the periphery of the mounting portion 42, as shown in fig. 7a, one surface of the breathing membrane 3 is an abutting surface that abuts against the end portion of the valve seat exhaust hole 21 near one end of the valve cover 4, and a gap between the abutting surface and the baffle 22 is reserved between the communicating jack 421 and the valve seat exhaust hole 21;

the positive pressure of the exhaust gas blows the breathing membrane 3 open when the patient exhales (the exhaust gas separates the valve seat exhaust hole 21 from the breathing membrane 3 to form a gap, the exhaust gas flows into the exhaust cavity from the gap, and then the breathing valve is exhausted from the valve cover exhaust hole 41), the exhaust gas in the mask is discharged, so as to reduce the stuffiness in use, the negative pressure during inspiration can close the breathing membrane 3, and prevent the pollutants from being sucked into the external environment, in the embodiment, as shown in fig. 10, the valve seat exhaust hole 21 is surrounded by the annular reinforcing rib 24 arranged on the valve seat body 25, and the breathing membrane 3 is abutted against the end part of the annular reinforcing rib 24;

the oxygen supply equipment can be an oxygen generator, a portable oxygen bottle and the like, and when oxygen inhalation is not needed, the oxygen supply connector 6 can be also closed by a connector plug (rubber plug), so that the mask with the oxygen supply connector and the breathing valve provided by the embodiment can be used as a common mask.

In a specific embodiment, as shown in fig. 2, a plurality of radially distributed partition plates 221 are disposed on a surface of the baffle 22, which is close to the oxygen supply plug 6, and the baffle 22 guides and shunts oxygen through the partition plates 221, so that the patient inhales the oxygen guided and shunted into the body, thereby improving the comfort of oxygen inhalation.

In a specific embodiment, as shown in fig. 5, the oxygen supply plug 6 further includes an air inlet tube 62 and a buckle 63, an air inlet cavity is disposed in the air inlet tube 62, an opening of the air inlet tube 62 is an air inlet cavity outlet, and a wall of the air inlet tube 62 far away from one end of the opening is provided with an air inlet cavity inlet;

a plurality of buckles 63 distributed in a circular array around the axis of the air inlet cylinder 62 are fixed on the end part of the air inlet cylinder 62, which is provided with one end, a gap is reserved between the adjacent buckles 63, and the buckles 63 are inserted into the insertion holes 421;

the intake pipe 61 is provided at an end of the intake cylinder 62 remote from the opening.

In a specific embodiment, as shown in fig. 9, an annular clamping groove 422 coaxial with the jack 421 is further provided in the mounting portion 42, the annular clamping groove 422 is disposed at one end of the jack 421 near the baffle 22, the fasteners 63 are engaged with the mounting portion 42 through the annular clamping groove 422, and the fasteners 63 distributed in a circular array can rotate in the jack 421;

the inlet of the air inlet cavity is formed in the side wall of one end, far away from the opening, of the air inlet cylinder 62, and the axis of the air inlet pipe 61 is perpendicular to the axis of the air inlet cylinder 62;

the hose of connecting oxygen bottle and intake pipe 61 is partly located oxygen uptake person's face, intake pipe 61 is motionless can make the hose after the connection because buckle the arch, not only shelter from the field of vision/tightly butt patient's face, can seriously pull the gauze mask when the patient turns around simultaneously, lead to wearing very uncomfortable, still probably lead to the gauze mask to produce great space with the face, lose the guard action, in this embodiment, buckle 63 according to circular array distribution rotates in jack 421 for oxygen supply plug 6 can rotate for installation department 42, the position of intake pipe 61 can be along with the hose adjustment, improve the use experience.

In a specific embodiment, as shown in fig. 2, the baffle 22 is provided with a support column 222, and the support column 222 is inserted into a hole surrounded by a plurality of buckles 63 distributed in a circular array, so that when the oxygen supply plug 6 rotates, the buckles 63 can be limited between the mounting portion 42 and the support column 222, and deformation of the buckles 63 in the rotating process is prevented, and the connection strength is affected.

In a specific embodiment, as shown in fig. 10, the valve seat 2 further includes a valve seat reinforcing rib 23, a plurality of valve seat reinforcing ribs 23 are radially distributed in the valve seat exhaust hole 21, one end of the valve seat reinforcing rib 23 is fixed on the valve seat body 25, the other end of the valve seat reinforcing rib 23 is fixed on one surface of the baffle 22 near the abutting surface, and one side of the valve seat reinforcing rib 23 near the valve cover 4 abuts against the abutting surface, so that a gap between the abutting surface and the baffle 22 is formed between the communicating jack 421 and the valve seat exhaust hole 21.

In a specific embodiment, as shown in fig. 9, the valve cover 4 further includes a valve cover reinforcing rib 43, a plurality of the valve cover reinforcing ribs 43 are radially distributed in the valve cover exhaust hole 41, one end of the valve cover reinforcing rib 43 is fixed on the valve cover body 44, and the other end of the valve cover reinforcing rib 43 is fixed on the mounting portion 42.

In a specific embodiment, as shown in fig. 9, the mounting portion 42 further includes a diaphragm protection plate 423, where the diaphragm protection plate 423 is disposed at an end of the mounting portion 42 away from the valve seat 2, and the diaphragm protection plate 423 is used to prevent particles in air such as wind sand from directly impacting the breathing diaphragm 3.

In a specific embodiment, as shown in fig. 1 and 8, the valve cover further comprises a sealing ring 5, wherein the sealing ring 5 is arranged between the valve cover 4 and the oxygen supply plug 6, and the sealing ring 5 ensures that the valve cover 4 and the oxygen supply plug 6 are in airtight contact.

In a specific embodiment, the valve seat 2, the valve cover 4 and the mask 1 are welded together by ultrasonic waves, in this embodiment, as shown in fig. 1 and 7a, the valve seat 2 passes through a round hole formed in the mask 1, and is welded together with the mask 1 and the valve cover 4, and the position of the breathing valve is located in the front half part of the arch of the mask 1, and is located at a certain distance from the face of a person when the breathing valve is worn, and is located between the nose and the mouth, so that good breathing comfort is ensured.

In a specific embodiment, one side of the valve seat reinforcing rib 23 away from the baffle 22 abuts against the end portion of the buckle 63 near one end of the baffle 22, and the valve seat reinforcing rib 23 abuts against the end portion of the buckle 63 to support the buckle 63, so that the oxygen supply plug 6 is prevented from loosening in the use process.

In a specific embodiment, a space is reserved between one side of the valve seat reinforcing rib 23 far away from the baffle 22 and the end of the buckle 63 near one end of the baffle 22, and no contact occurs between the valve seat reinforcing rib 23 and the end of the buckle 63, so that the oxygen supply plug 6 rotates more smoothly.

As shown in fig. 7b, oxygen flows from the oxygen supply device into the air inlet pipe 61, flows through the air inlet cavity of the air inlet cylinder 62, enters the insertion hole 421, flows to the baffle plate 22 through the gap left between the adjacent buckles 63 between the insertion hole 421 and the support posts 222, flows into the valve seat exhaust hole 21 through the gap between the abutting surface and the baffle plate 22, and is inhaled by a patient.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A mask with an oxygen supply port and a breather valve, comprising: a mask (1), a breather valve and an oxygen supply plug (6);

the breather valve is arranged on the mask (1) and comprises a valve seat (2), a breather membrane (3) and a valve cover (4) buckled with the valve seat (2);

the valve seat (2) comprises a baffle plate (22) and a valve seat body (25) which are fixedly connected with each other, a valve seat exhaust hole (21) is formed in the valve seat body (25), and the baffle plate (22) is positioned in the valve seat exhaust hole (21);

the valve cover (4) comprises a mounting part (42) and a valve cover body (44) which are fixedly connected with each other, wherein the valve cover body (44) is provided with a valve cover exhaust hole (41), and the mounting part (42) is positioned in the valve cover exhaust hole (41);

an exhaust cavity is enclosed between the valve seat (2) and the valve cover (4), and the valve seat exhaust hole (21) and the valve cover exhaust hole (41) are respectively positioned at two ends of the exhaust cavity;

an air inlet pipe (61) connected with oxygen supply equipment is arranged on the oxygen supply plug (6), the oxygen supply plug (6) is inserted into a jack (421) arranged in the mounting part (42), an air inlet cavity is arranged in the oxygen supply plug (6), an inlet of the air inlet cavity is communicated with the air inlet pipe (61), and an outlet of the air inlet cavity is communicated with the jack (421) and faces the baffle plate (22);

the breathing membrane (3) is located in the exhaust cavity and sleeved on the periphery of the installation part (42), one face of the breathing membrane (3) is a contact face which is mutually contacted with the end part of the valve seat exhaust hole (21) close to one end of the valve cover (4), and a gap between the contact face and the baffle (22) is reserved between the communication jack (421) and the valve seat exhaust hole (21).

2. The mask with the oxygen supply interface and the breathing valve according to claim 1, wherein a plurality of radially distributed partition plates (221) are arranged on one surface of the baffle plate (22) close to the oxygen supply plug (6).

3. The mask with the oxygen supply interface and the breathing valve according to claim 1, wherein the oxygen supply plug (6) further comprises an air inlet cylinder (62) and a buckle (63), an air inlet cavity is arranged in the air inlet cylinder (62), an opening of the air inlet cylinder (62) is an air inlet cavity outlet, and a cylinder wall of the air inlet cylinder (62) far away from one end of the opening is provided with an air inlet cavity inlet;

a plurality of buckles (63) distributed in a circular array around the axis of the air inlet cylinder (62) are fixed on the end part of the air inlet cylinder (62) with one end provided with the opening, gaps are reserved between adjacent buckles (63), and the buckles (63) are inserted into the insertion holes (421);

the air inlet pipe (61) is arranged at one end of the air inlet cylinder (62) far away from the opening.

4. A mask with an oxygen supply interface and a breather valve according to claim 3, wherein an annular clamping groove (422) coaxial with the jack (421) is further arranged in the mounting part (42), the annular clamping groove (422) is arranged at one end, close to the baffle plate (22), in the jack (421), the buckles (63) are clamped with the mounting part (42) through the annular clamping groove (422), and the buckles (63) distributed in a circular array can rotate in the jack (421);

the inlet of the air inlet cavity is formed in the side wall of one end, far away from the opening, of the air inlet cylinder (62), and the axis of the air inlet pipe (61) is perpendicular to the axis of the air inlet cylinder (62).

5. A mask with oxygen supply port and breathing valve according to claim 3, characterized in that the baffle (22) is provided with a pillar (222), and the pillar (222) is inserted into a hole surrounded by a plurality of buckles (63) distributed in a circular array.

6. The mask with the oxygen supply interface and the breathing valve according to claim 1, wherein the valve seat (2) further comprises valve seat reinforcing ribs (23), a plurality of the valve seat reinforcing ribs (23) are radially distributed in the valve seat exhaust hole (21), one end of each valve seat reinforcing rib (23) is fixed on the valve seat body (25), the other end of each valve seat reinforcing rib (23) is fixed on one surface, close to the abutting surface, of the corresponding baffle plate (22), and one side, close to the valve cover (4), of each valve seat reinforcing rib (23) abuts against the abutting surface, so that a gap between the corresponding abutting surface and the corresponding baffle plate (22) is formed between the corresponding communicating jack (421) and the corresponding valve seat exhaust hole (21).

7. The mask with the oxygen supply interface and the breather valve according to claim 1, wherein the valve cover (4) further comprises valve cover reinforcing ribs (43), a plurality of the valve cover reinforcing ribs (43) are radially distributed in the valve cover exhaust hole (41), one end of the valve cover reinforcing rib (43) is fixed on the valve cover body (44), and the other end of the valve cover reinforcing rib (43) is fixed on the mounting part (42).

8. The mask with the oxygen supply port and the breather valve according to claim 1, wherein the mounting portion (42) further comprises a diaphragm protection plate (423), and the diaphragm protection plate (423) is disposed at an end of the mounting portion (42) away from the valve seat (2).

9. The mask with the oxygen supply interface and the breathing valve according to claim 1, further comprising a sealing ring (5), wherein the sealing ring (5) is arranged between the valve cover (4) and the oxygen supply plug (6).