CN218485022U

CN218485022U - Nose cover and oronasal mask thereof

Info

Publication number: CN218485022U
Application number: CN202221985118.0U
Authority: CN
Inventors: 林励章
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2023-02-17
Anticipated expiration: 2032-07-29

Abstract

The utility model relates to an air filtration technology field provides a nose cup and oronasal mask thereof. The nose cup includes that nose cup body and holding are in supporter in the nose cup body, and the centre gripping is in the nose cup body with filter between the supporter, inlay in the nose cup body and be equipped with at least one first permanent magnet, it is equipped with the correspondence to inlay in the supporter at least one second permanent magnet of at least one first permanent magnet, make the supporter passes through magnetism and inhales effect detachably attach in the nose cup body, also can be in response to the magnetism effect of inhaling of above-mentioned nose cup body and above-mentioned supporter body, not only can stabilize above-mentioned filter, also can dismantle easily and change above-mentioned filter. The oronasal mask includes this nose cup and detachably installs gauze mask on the nose cup, the gauze mask through magnetism inhale effect detachably attach to on the nose cup.

Description

Nose cover and oronasal mask thereof

Technical Field

The utility model relates to an air filtration technical field especially relates to a nose cup and oronasal mask thereof.

Background

At present, the known protective mask is an ear-hanging type mask or a full-face mask, and is usually worn at the mouth and nose part to filter air entering the mouth and nose so as to block harmful gas, smell and spray from entering and exiting the mouth and nose of a wearer. The existing mask covers the mouth and the nose at the same time, conversation is influenced, and the mask is large in area, large in material waste during replacement, uncomfortable and easy to breed bacteria.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a nose mask and an oronasal mask having the same that can solve the above problems.

Therefore, the utility model provides a nose cover, be in including nose cover body and holding supporter in the nose cover body, and the centre gripping is in the nose cover body with filter body between the supporter, it is equipped with at least one first permanent magnet to inlay in the nose cover body, it is equipped with the correspondence to inlay in the supporter at least one second permanent magnet of at least one first permanent magnet, makes the supporter is in through magnetism suction effect detachably attach in the nose cover body.

In some embodiments, the mask body includes a first body portion and a first extension portion extending from an outer periphery of the first body portion, the support body is received in a first receiving cavity surrounded by the first body portion and the first extension portion, and the first body portion is provided with a plurality of first through holes.

In some embodiments, the at least one first permanent magnet is disposed in the first body portion by insert molding.

In some embodiments, the support body includes a second body portion and a second extension portion extending from an outer periphery of the second body portion, and the second body portion is provided with a plurality of second through holes corresponding to the plurality of first through holes.

In some embodiments, the at least one second permanent magnet is provided in the second body part by means of insert moulding.

In some embodiments, the support body is provided with a nasal mask sealing portion disposed on a side of the second extension portion remote from the second body portion.

In some embodiments, the nose cup sealing portion is provided with a first curved surface engaging portion adapted to the shape of the face of the user, and a first protrusion provided inside the first curved surface engaging portion.

In some embodiments, a respirator is detachably attached to the nose mask through magnetic attraction, and at least one third permanent magnet corresponding to the at least one first permanent magnet is arranged in the respirator.

The utility model also provides a mouth-nose mask, which comprises a nose mask and a mouth mask detachably arranged on the nose mask, wherein the nose mask is the nose mask, and the mouth mask is detachably attached to the nose mask through the magnetic attraction effect; the mask is provided with a third through hole for air inlet of the mask on the air inlet surface of the mask body, and the outer surface of the mask body at the position is attached to the inner side surface of the mask and keeps sealed.

In some embodiments, the mask has a partition plate extending vertically inward on an inner side thereof to divide a receiving space of the mask into upper and lower receiving chambers isolated from each other, and the nose mask is coupled to the upper receiving chamber.

In some embodiments, a sealing ring is arranged between the air inlet surface of the nose mask body and the inner side surface of the mask, and the air tightness between the nose mask and the mask is kept by pressing the sealing ring after the nose mask and the mask are attached through magnetic attraction.

In some embodiments, a one-way valve for exhausting gas and/or an exhaust device capable of forming negative pressure in the receiving cavity are arranged in the lower receiving cavity.

The utility model provides a low cost of oronasal mask and convenience of customers uses, and gauze mask and nose cup detachable connect can convenience of customers wear nose mask and gauze mask simultaneously and wear the nose mask alone to be applicable to different service environment.

Drawings

Fig. 1 is a perspective view of an oronasal mask according to an embodiment of the present invention.

Figure 2A shows an exploded view of the oronasal mask of figure 1.

Figure 2B illustrates an exploded view of the oronasal mask of figure 1 in another orientation.

Figure 3 illustrates an exploded view of the nasal mask of the oronasal mask of figure 1.

Figure 4A illustrates an exploded view of the mask of the oronasal mask of figure 1.

Figure 4B illustrates an exploded view of the mask of the oronasal mask of figure 1 in another orientation.

Reference numerals are as follows: 100-oronasal mask; 2-a nose mask; 20-a mask body; 201-a support; 202-a cover; 203-a first body portion; 204-a first extension; 205-a first via; 206-ribs; 207-second via; 208-a second extension; 209-a second body portion; 21-a nose cup sealing part; 210-a first curved surface attachment portion; 211-a first attachment; 212-a second attachment; 213-third fitting part; 214-a first bump; 22-a connecting part; 23-a first housing chamber; 24-a first permanent magnet; 25-a second permanent magnet; 26-a filter body; 27-a second receiving chamber; 28-a flange; 1-mask; 10-mask body; 101-a third body portion; 102-a third extension; 103-a third via; 104-flanging; 11-mask sealing part; 110-a second curved surface attachment portion; 111-a fourth laminating portion; 112-fifth attaching part; 113-a sixth bonding portion; 114-a second protrusion; 12-a separator; 13-a third containing cavity; 131-a wall portion; 14-a fourth containing cavity; 15-a third permanent magnet; 16-accommodation space.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, so that the technical solutions and the advantages thereof of the present invention will be more clearly understood. It is to be understood that the drawings are provided for purposes of illustration and description only and are not intended as a definition of the limits of the invention, but the dimensions shown in the drawings are for convenience and are not to be taken as limiting the scale.

Referring also to fig. 1-2B, an oronasal mask 100 in accordance with an embodiment of the invention is shown. The oronasal mask 100 includes a mask 1 and a nasal mask 2. The mask 1 is detachably mounted on the nose mask 2. In other words, the mask 1 detachably receives the nose mask 2. In this embodiment, the mask 1 is attached to the nose mask 2 by magnetic attraction. The mask 1 is used to block contaminants or pathogens, etc. from entering the mouth of a user. The nose mask 2 serves to filter air inhaled from the nose. After a user wears the oronasal mask 100, air inhaled from the nose passes through the mask 1 and is filtered by the nasal mask 2 to be inhaled from the nose of the user; when the user needs to talk, eat, drink water and the like, the mask 1 can be detached and only the nose mask 2 is worn, so that the user can conveniently carry out the activities and the respiratory protection is ensured.

Referring to fig. 2A to 3 together, the nose mask 2 includes a mask body 20 and a support 201 received in the mask body 20, and a filter 26 interposed between the mask body 20 and the support 201. The support 201 is attached in the mask body 20 by magnetic attraction. The mask body 20 includes a mask body 202 and two connecting portions 22 disposed symmetrically at both sides of the mask body 202. An attachment (not shown) may be attached to the two connecting portions 22 to secure the mask body 202 of the nasal mask 2 at the nose of the user. The cover 202 is made of a hard glue material. The cover 202 includes a first body portion 203 and a first extension portion 204 extending from an outer periphery of the first body portion 203. The first body portion 203 and the first extension portion 204 enclose a first receiving cavity 23 with the first body portion 203 as a top and the first extension portion 204 as a side for receiving the supporting body 201. The two connecting portions 22 are disposed on both sides of the first extension portion 204. The first body portion 203 is provided with a plurality of first through holes 205. The plurality of first through holes 205 correspond to the user's nose. At least one first permanent magnet 24 is disposed in the first body portion 203. Preferably, the at least one first permanent magnet 24 comprises two first permanent magnets. In the present embodiment, two first permanent magnets 24 are symmetrically disposed on both sides of the region where the plurality of first through holes 205 are located. In the present embodiment, the at least one first permanent magnet 24 is molded in the first body portion 203 by means of insert molding.

The support body 201 of the nasal mask 2 is attached to the first body portion 203 of the nasal mask body 20 by magnetic attraction. Specifically, at least one second permanent magnet 25 corresponding to the at least one first permanent magnet 24 is disposed in the support body 201. In the present embodiment, the at least one second permanent magnet 25 is molded in the support body 201 by means of insert molding.

Preferably, the supporting body 201 includes a second body portion 209 and a second extending portion 208 extending from the outer periphery of the second body portion 209. The second body portion 209 is provided with a plurality of second through holes 207. The second through hole 207 corresponds to the nose of the user, and is disposed in the second body 209 corresponding to the area occupied by the plurality of first through holes 205. The at least one second permanent magnet 25 is disposed in the second body portion 209. Preferably, the at least one second permanent magnet 25 includes two second permanent magnets. In the present embodiment, the two second permanent magnets 25 are symmetrically disposed at both sides of the area where the plurality of second through holes 207 are located. The spaced second through holes 207 form ribs 206 between each other for supporting the filter body 26. When the support body 201 is engaged in the mask body 202 of the mask body 20 under the magnetic attraction between the at least one second permanent magnet 25 and the at least one first permanent magnet 24, the filter body 26 is sandwiched between the support body 201 and the mask body 202 and covers the plurality of first through holes 205 and the plurality of second through holes 207. Therefore, the user can conveniently replace the filter body 26, and the filter body 26 can not be displaced or even fall off, thereby ensuring the stability of the structure. In this embodiment, the filter body 26 is also clamped between the at least one first permanent magnet 24 and the at least one second permanent magnet 25 to further prevent displacement of the filter body 26.

In this embodiment, the second extension portion 208 extends in a substantially outward-expanding shape, so that the filter 26 is away from the end of the second extension portion 208 by a certain distance, which prevents the filter 26 from directly contacting the nose of the user, effectively prevents nasal mucus or facial grease, dandruff, etc. from affecting the filter 26, ensures the filtering effect of the oronasal mask 100, and can prevent the influence of bacterial growth on the facial skin. In this embodiment, the filter 26 is a medical or sanitary non-woven fabric, which is a new generation of environmental protection material, and has the advantages of good strength, air permeability, water resistance, environmental protection, flexibility, no toxicity, no odor, low price, no irritation, etc. The filter body 26 can effectively filter air, toxic gas, PM2.5, bacteria, viruses, pollen, haze, dust and the like.

The support body 201 is provided with a nose cup sealing portion 21 provided on a side of the second extending portion 208 remote from the second main body portion 209. The nose mask sealing part 21 is made of soft rubber materials. The nose cup sealing portion 21 is in close contact with the face of the user. In the present embodiment, the support body 201 and the nose cup sealing part 21 are integrally molded in a mold, thereby eliminating manual manipulation and adhesives. Optionally, the support body 201 and the nose cup sealing portion 21 are removably coupled together to facilitate disassembly for cleaning by a user. The support body 201 and the nose seal 21 enclose a second receiving chamber 27 having the support body 201 as a top and the nose seal 21 as a bottom.

The user is when wearing this oronasal mask 100, user's face is hugged closely to nose cup sealing 21, because nose cup sealing 21's compliance and resilience are splendid, make it warp along with the motion of user face's muscle, have dynamic driving fit effect, can prevent to form the space between this oronasal mask 100 and the user face, consequently, unfiltered air can not directly be inhaled by the user, and then makes the utility model discloses better filter effect has.

The nose mask sealing part 21 is provided with a first curved surface fitting part 210 adapted to the shape of the face of the user, and a first protrusion 214 provided inside the first curved surface fitting part 210. The first curved surface attachment portion 210 is raised away from the second extension portion 208 of the support body 201. The first protrusion 214 is disposed on the concave side of the first curved surface attaching part 210. In the present embodiment, the first protrusion 214 extends substantially perpendicular to the first curved surface attaching portion 210. Preferably, the first protrusion 214 and the outer side of the first curved surface fitting portion 210 form an engagement groove. In the present embodiment, the second extension portion 208 is engaged in the engagement groove. Alternatively, the first protrusion 214 may be formed integrally with the second extension 208. In this embodiment, the outer side of the second extension 208 forms the flared rim 28. The mask sealing portion 11 is engaged with the flange 28, that is, the flange 28 is engaged between the first projection 214 and the outer side of the first curved surface attaching portion 210, thereby securing the sealing effect. The flange 28 is designed to make the mask 2 more comfortable and more ergonomic.

The first curved surface fitting part 210 comprises a first fitting part 211 which is arranged on the upper part of the nose cover sealing part 21 and is matched with the shape of the nose bridge region, a second fitting part 212 which is arranged in the middle of the nose cover sealing part 21 and is matched with the shape of the cheek region, and a third fitting part 213 which is arranged on the lower part of the nose cover sealing part 21 and is matched with the shape of the upper lip region. Specifically, in the embodiment of the utility model provides an in, nose cup sealing portion 21 has adopted three-dimensional 3D design method, is provided with in the one side with human face laminating include first laminating portion 211 second laminating portion 212 with third laminating portion 213, the setting of curved surface then can perfectly agree with the shape of user's face, accord with ergonomic design, closely laminate with user's face, both guaranteed nose cup 2's leakproofness, make 2 non-stick mouth faces of nose cup again, reduced the oppression sense of mouth nose, improved the comfort level of using.

When in use, the user can independently use the nose mask 2 to carry out respiratory protection, and the activities of talking, eating, drinking and the like of the user are not affected; and when the user needs to protect the mouth, the mask 1 can be simply attached to the nose mask 2 to cover the mouth and nose at the same time, and the mask 1 can be detachably attached to the nose mask 2 under the magnetic attraction action without using a binding member such as a hanging string. Specifically, at least one third permanent magnet 15 corresponding to the at least one first permanent magnet 24 is provided in the mask 1. In the present embodiment, the at least one third permanent magnet 15 is molded in the mask 1 by means of insert molding. In the present embodiment, the at least one first permanent magnet 24, the at least one second permanent magnet 25, and the at least one third permanent magnet 15 are all embedded in their respective positions, not visible from the outside.

Referring to fig. 2A, 2B, 4A and 4B together, the mask 1 includes a mask body 10 and a mask sealing part 11 provided at an inner side of the mask body 10. The mask body 10 is made of a hard rubber material. The mask sealing part 11 is made of soft rubber material. The mask seal 11 is in close contact with the face of the user. In this embodiment, the mask body 10 and the mask seal portion 11 are molded integrally in a mold, thereby eliminating manual operation and adhesives. Optionally, the mask body 10 and the mask sealing part 11 are detachably connected together to facilitate disassembly and cleaning by a user. The mask body 10 and the mask seal 11 enclose an accommodation space 16 having the mask body 10 as a top and the mask seal 11 as a bottom.

When wearing the gauze mask, can use oral area inhaled air because of the urgent need of breathing unavoidably, for preventing to have the space to lead to not filtering the filterable air of filter 26 to enter into the oral area between gauze mask 1 and the nose mask body 10, need guarantee also to keep sealed between nose mask body 10 and the gauze mask 1 to make the air must supply the human breathing needs through nose mask body 10 and filter 26 after getting into by the third through hole of gauze mask 1. For this purpose, the outer surface of the nose mask body 20 is fitted to and sealed with the inner side surface of the mask, and specifically, a seal ring is provided between the air inlet surface of the nose mask body and the inner side surface of the mask, and the air tightness between the nose mask and the mask is maintained by pressing the seal ring after the attachment of the nose mask and the mask by magnetic attraction.

The gauze mask sealing part 11 that sets up is sealed in order to guarantee the laminating of gauze mask and face, can form the malleation in gauze mask 1 when exhaling to jack up whole gauze mask 1, make and produce the hole between gauze mask sealing part 11 and the user face and just can realize, also consequently may arrive to exhale smoothly. In order to solve the problem, a one-way valve for exhausting gas can be arranged in the lower containing cavity of the mask, so that the exhaust of the gas exhaled by the human body is facilitated. For further improvement, the air exhausting device for negative pressure can be formed in the accommodating cavity, the air of the mask is directly blown out through the air exhausting device, the negative pressure formed in the mask by the air exhausting device is facilitated to promote the air to enter the mask body 10 after being filtered, and the air is supplied to the human body for expiration, so that the problem of breathing difficulty caused by wearing the nose mask and the mask can be greatly improved.

The mask body 10 includes a third body 101 and a third extension 102 extending from the outer periphery of the third body 101. The third body 101 has a plurality of third through holes 103 corresponding to the plurality of first through holes 205 of the nose mask 2. In this embodiment, the plurality of third through holes 103 are disposed at the upper part of the third body 101, and when in use, the plurality of third through holes 103 correspond to the nose of a user. A partition plate 12 extending vertically inward is provided inside the third body 101 to divide the accommodation space 16 into an upper third accommodation chamber 13 and a lower fourth accommodation chamber 14, which are not affected by each other. The plurality of third through holes 103 are disposed at positions of the third body 101 corresponding to the third receiving cavity 13. The fourth receiving chamber 14 covers the mouth of the user when in use, thereby preventing contaminants, pathogens, etc. from entering the mouth of the user and preventing gas exhaled from the mouth from entering the third receiving chamber 13.

Preferably, the third body 101 of the mask 1 is provided with the at least one third permanent magnet 15 therein. In the present embodiment, the at least one third permanent magnet 15 is molded in the third body portion 101 by means of insert molding. At least one third permanent magnet 15 is disposed at one side of the region where the plurality of third through holes 103 are located. Preferably, the at least one third permanent magnet 15 comprises two third permanent magnets. In the present embodiment, two third permanent magnets 15 are symmetrically disposed on both sides of the region where the plurality of third through holes 103 are located. Thereby, the mask 1 is attached to the nose mask 2 by the mutual magnetic attraction of the at least one third permanent magnet 15 and the at least one first permanent magnet 24. When the mask 1 is attached to the nose mask 2, the nose mask 2 is received in the third receiving chamber 13 of the mask 1. In this embodiment, two symmetrical wall portions 131 are provided at the upper portion of the third accommodating chamber 13. The contours of the partition 12 and the two wall portions 131 are adapted to the outer shape of the mask 2. The wall 131 of the third receiving chamber 13 and the partition 12 prevent the mask 1 from being displaced with respect to the nose mask 2. It is envisaged that the wall portion 131 could be omitted and the diaphragm 12 and the third extension 102 contoured to fit the external shape of the mask 2.

In this embodiment, the third extending portion 102 of the mask body 10 extends in a substantially flaring shape. The mask sealing portion 11 is disposed on a side of the third extending portion 102 away from the third main body 101. The user is when wearing this oronasal mask 100, user's face is hugged closely to gauze mask sealing 11, because the compliance and the resilience of gauze mask sealing 11 are splendid, make it warp along with the motion of user face's muscle, have dynamic driving fit effect, can prevent to form the space between this oronasal mask 100 and the user face, consequently, unfiltered air can not directly be inhaled by the user, and then makes the utility model discloses better filter effect has.

The mask sealing part 11 is provided with a second curved surface fitting part 110 adapted to the shape of the face of the user, and a second protrusion 114 provided on the inner side of the second curved surface fitting part 110. The second curved surface fitting portion 110 is raised away from the third extending portion 102 of the mask body 10. The second protrusion 114 is disposed on the concave side of the second curved surface attaching part 110. In this embodiment, the second protrusion 114 extends substantially perpendicular to the second curved surface fitting portion 110. Preferably, the second protrusion 114 and the outer side of the second curved surface fitting portion 110 form an engagement groove. In the present embodiment, the third extension 102 is engaged in the engagement groove. Alternatively, the second protrusion 114 may be formed integrally with the third extension 102. In this embodiment, the outer side of the third extension 102 forms an outwardly flared bead 104. The mask sealing portion 11 is joined to the cuff 104, that is, the cuff 104 is joined between the second projection 114 and the outside of the second curved surface fitting portion 110. The design of the cuff 104 makes the mask 1 more comfortable and more ergonomic.

The second curved surface attaching portion 110 includes a fourth attaching portion 111 disposed on the upper portion of the mask sealing portion 11 and adapted to the shape of the nasal bridge region, a fifth attaching portion 112 disposed on the middle portion of the mask sealing portion 11 and adapted to the shape of the cheek region, and a sixth attaching portion 113 disposed on the lower portion of the mask sealing portion 11 and adapted to the shape of the chin region. Specifically, in the embodiment of the utility model, gauze mask sealing 11 has adopted three-dimensional 3D design method, is provided with in the one side of laminating with human face and includes fourth laminating portion 111 fifth laminating portion 112 with sixth laminating portion 113, the setting of curved surface then can perfectly agree with the shape of user face, accord with ergonomic design, closely laminate with user face, both guaranteed gauze mask 1's leakproofness, make 1 non-stick mouth face of gauze mask again, reduced the sense of oppressing of mouth and nose, improved the comfort level of using. Therefore, on the premise that the mask sealing part 11 ensures the fitting degree of the mask 1 to the face of the user, the mask 1 can be detachably attached to the nose mask 2 under the magnetic attraction effect when no binding member such as a hanging rope is used.

The utility model provides an oronasal mask 100, which is convenient for users to carry and has low cost; and is easy to wear and remove. The user can clean the mask 1 and the nose mask 2 by himself, and the user only replaces the filter 26 when using the mask, thereby greatly reducing the consumption cost of the user. In addition, gauze mask 1 and nose cup 2 detachable connection can make things convenient for the user to wear nose cup 2 and gauze mask 1 simultaneously and wear nose cup 2 alone to be applicable to different service environment.

The above description is only a preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above listed embodiments, any person skilled in the art can obviously obtain simple changes or equivalent substitutions of the technical solutions within the technical scope of the present invention.

Claims

1. A nose mask, comprising a nose mask body (20), a support body (201) accommodated in the nose mask body (20), and a filter body (26) clamped between the nose mask body (20) and the support body (201), characterized in that at least one first permanent magnet (24) is embedded in the nose mask body (20), at least one second permanent magnet (25) corresponding to the at least one first permanent magnet (24) is embedded in the support body (201), so that the support body (201) is detachably attached in the nose mask body (20) by magnetic attraction.

2. The nasal mask according to claim 1, wherein the cover (202) of the nasal mask body (20) comprises a first body portion (203) and a first extension portion (204) extending from an outer periphery of the first body portion (203), the support body (201) is received in a first receiving cavity (23) enclosed by the first body portion (203) and the first extension portion (204), and the first body portion (203) is provided with a plurality of first through holes (205).

3. Nasal mask according to claim 2, characterized in that said at least one first permanent magnet (24) is provided in said first body portion (203) by means of insert moulding.

4. Nasal mask according to claim 2, characterized in that said support body (201) comprises a second body portion (209) and a second extension (208) extending from the periphery of said second body portion (209), said second body portion (209) being provided with a plurality of second through holes (207) corresponding to said plurality of first through holes (205).

5. Nasal mask according to claim 4, characterized in that said at least one second permanent magnet (25) is provided in said second body portion (209) by means of insert moulding.

6. A nasal mask according to claim 4, wherein the support body (201) is provided with a nasal mask sealing portion (21) provided on a side of the second extension portion (208) remote from the second body portion (209).

7. The nasal mask according to claim 6, wherein the nasal mask sealing portion (21) is provided with a first curved conforming portion (210) conforming to the shape of the user's face, and a first protrusion (214) provided inside the first curved conforming portion (210).

8. Nasal mask according to claim 1, characterized in that a mask (1) is removably attached to the mask by magnetic attraction, the mask (1) having at least one third permanent magnet (15) provided therein in correspondence of the at least one first permanent magnet (24).

9. An oronasal mask comprising a nasal mask and a mouth mask detachably mounted on the nasal mask, wherein the nasal mask is as claimed in any one of claims 1 to 7, and the mouth mask is detachably attached to the nasal mask by magnetic attraction; the third through hole for the air inlet of the mask is formed in the air inlet surface of the mask body (20), and the outer surface of the mask body (20) at the position is attached to the inner side face of the mask and keeps sealed.

10. An oronasal mask according to claim 9 wherein the mask is provided on its inner side with a partition (12) extending vertically inwardly to divide the receiving space (16) of the mask into upper and lower chambers separated from each other, the mask engaging in the upper chamber.

11. An oronasal mask according to claim 9 wherein a sealing ring is provided between the air inlet surface of the mask body (20) and the inner face of the mask, the sealing ring being compressed after attachment of the mask and mask by magnetic attraction to maintain air-tightness therebetween.

12. An oronasal mask according to claim 10 wherein the lower chamber is provided with a one way valve for venting gas and/or venting means to create a negative pressure in the chamber.