Adjustable half mask

Abstract

The utility model discloses an adjustable half mask, which relates to the technical field of gas masks and comprises an outer mask, an inner mask is fixedly mounted at an opening of the outer mask and used for fitting the face of a wearer, an ox horn air cushion is fixedly mounted on the inner mask, and the other end of the ox horn air cushion is fixedly connected with the outer mask. And an upper bandage and a lower bandage are fixedly mounted on the outer side of the opening of the outer mask. Compared with the prior art, the shape of the inner mask can be changed to be attached to the face of a user through the inner mask wrapping edge internally provided with the iron wire, a gap generated between the inner mask wrapping edge and the face is pressed through the arranged ox horn air cushion, the inner mask wrapping edge is completely attached to the face, and the face of the user is more comfortable. The upper bandage and the lower bandage can be adjusted more simply and conveniently through the adjusting assembly, the contact area with the head of the user is increased, compression of the upper bandage and the lower bandage on the head of the user is reduced, and the use comfort is better.

Description

Technical Field

[0001] The utility model relates to the technical field of gas masks, and particularly relates to an adjustable half mask. Background Art

[0002] A gas mask is a protective article used to be worn on the head to protect a person's respiratory organs, eyes and face from being harmed by poisonous substances such as poisonous gases, dust, bacteria, toxic and harmful gases or vapors. These masks are usually used in dangerous environments, such as chemical plants, laboratories, medical environments, etc. They can filter harmful substances in the air, enabling people to breathe relatively safe air. Gas masks are widely used in fields such as petroleum, chemical industry, mines, metallurgy, fire fighting, emergency rescue, epidemic prevention and control, environmental protection of science and technology, and machinery manufacturing.

[0003] Chinese Patent with the publication number CN213789674U discloses a single-box half-face gas mask, which includes a gas mask body, an intake valve piece, an exhaust valve piece, an exhaust valve cover, a wearing head frame, an elastic band and a tightening buckle. By adopting a detachable and adjustable setting as a whole, it is convenient for cleaning and disinfection and is conducive to repeated use. This technology reduces the pressure on the nose bridge by reducing the thickness of the mask at the nose bridge position. However, different users have different face shapes and different nose bridge heights. Since the edges of the mask are fixed, it cannot fit the faces of all users. In order to obtain a better sealing effect, most users will tighten the straps to compress the places where the mask contacts the face, so that the mask fits the face. When the mask fits, it will still cause compression on other parts of the face, causing discomfort to the wearer. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an adjustable half mask to solve the problem that the existing technology in the above-mentioned background art cannot fit the faces of all users and is prone to compress the user's face during use, causing discomfort to the wearer.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: An adjustable half mask, comprising: an outer mask, an inner mask is fixedly installed at the opening of the outer mask, the inner mask is used to fit the face of the wearer, a horn air cushion is fixedly installed on the inner mask, the other end of the horn air cushion is fixedly connected to the outer mask, an upper strap and a lower strap are fixedly installed outside the opening of the outer mask, an inner mask edge is arranged with an opening on one side of the inner mask, a wire is fixedly arranged inside the inner mask edge, and the shape of the inner mask edge is adapted to the shape of a person's face;

[0006] An adjusting component, which is fixedly installed at one end of the upper strap and the lower strap, and the adjusting component is used to adjust the lengths of the upper strap and the lower strap.

[0007] Preferably, air inlet valve ports are threadedly installed on both sides of the outer mask. A filter element and a check valve disc are arranged inside the air inlet valve port. An air outlet valve port is threadedly installed at the bottom of the outer mask. A check valve disc is arranged inside the air outlet valve port. A strap seat is fixedly installed on the outer side of the opening of the outer mask. An outer mask edge wrapping is fixedly arranged at the edge of the opening of the outer mask. The outer mask edge wrapping is made of hard plastic.

[0008] Preferably, the inner mask is fixedly installed inside the opening of the outer mask, and the inner mask extends outward and exceeds one end of the opening of the outer mask by a certain distance.

[0009] Preferably, the ox horn air cushion is in the shape of an ox horn. A crease is arranged in the middle part of the ox horn air cushion. An airbag is arranged inside the ox horn air cushion. One end of the ox horn air cushion is fixedly installed on the protrusions corresponding to the nose wing, cheek and chin on the inner mask edge wrapping, and the other end of the ox horn air cushion is fixedly connected to the outer mask edge wrapping.

[0010] Preferably, the adjusting assembly includes adjusting seats sleeved on the upper strap and the lower strap. A sponge is fixedly arranged on one side of the adjusting seat. One side of the sponge has a curvature. An upper belt buckle and a lower belt buckle are fixedly installed on one side of the adjusting seat. A rotating shaft is rotatably installed on one side of the adjusting seat. The upper strap passes through the upper belt buckle and is fixedly connected to the rotating shaft. The lower strap passes through the lower belt buckle and is fixedly connected to the rotating shaft. An adjusting wheel is fixedly installed in the middle of the rotating shaft. A ratchet is fixedly arranged in the middle of the adjusting wheel. A pawl is slidably installed on one side of the adjusting seat. The pawl is adapted to the ratchet. One side of the pawl is connected to the adjusting seat through a spring.

[0011] Preferably, both the inner mask and the inner mask edge wrapping are made of soft rubber.

[0012] Preferably, the strap seats are evenly distributed on the outer edge of the opening of the outer mask. The two groups of strap seats at the uppermost position are fixedly connected to one end of the upper strap. One end of the lower strap leads out two straps through a triangular buckle, and the ends of the straps are respectively fixedly connected to the four groups of strap seats at the lower position.

[0013] The technical effects and advantages of the present utility model:

[0014] The structure of the utility model is reasonable. Through the inner cover edge provided with iron wires inside, the inner mask can change its shape to fit the user's face. Through the ox horn air cushions fixedly installed on the inner cover edge, the gaps generated between the inner cover edge and the face are tightened, so that the inner cover edge is completely attached to the face, making the inner mask fit more closely to the user's face. At the same time, because the elasticity of the ox horn air cushions is not strong, when the upper strap and the lower strap are tightened excessively, it will not cause excessive compression on the inner mask. Compared with the prior art, it not only has stronger adaptability to the faces of different users, but also can prevent the excessive compression on the user's face caused by excessive tightening, making the wearing comfort better;

[0015] In the utility model, through the cooperation of the ratchet and the pawl, after the user wears it, only by turning the adjustment wheel behind the head can the upper strap and the lower strap be tightened. Only by pushing the pawl can the rotating shaft be restored to rotate, so as to take off the mask. Compared with the prior art, the adjustment of the upper strap and the lower strap is simpler and more convenient. And because the adjustment seat fits with the back of the user's head, the contact area with the user's head is increased, reducing the compression of the upper strap and the lower strap on the user's head, making the use comfort better. Brief Description of the Drawings

[0016] Figure 1 is the front three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 is the three-dimensional structure schematic diagram of the inner mask of the utility model;

[0018] Figure 3 is the three-dimensional structure schematic diagram of the adjustment component of the utility model;

[0019] Figure 4 is the cross-sectional structure schematic diagram of the adjustment component of the utility model;

[0020] Figure 5 is the three-dimensional structure schematic diagram of the ox horn air cushion of the utility model.

[0021] In the figure: 1, outer mask; 2, inner mask; 3, air inlet valve port; 4, air outlet valve port; 5, strap seat; 6, outer cover edge; 7, inner cover edge; 8, ox horn air cushion; 9, upper strap; 10, lower strap; 11, adjustment seat; 12, upper buckle; 13, lower buckle; 14, rotating shaft; 15, adjustment wheel; 16, ratchet; 17, pawl. Detailed Embodiment

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 to 5 shown, an adjustable half mask includes: an outer mask 1, an inner mask 2 is fixedly installed at the opening of the outer mask 1, the inner mask 2 is used to fit the face of the wearer, a horn air cushion 8 is fixedly installed on the inner mask 2, the other end of the horn air cushion 8 is fixedly connected to the outer mask 1, and an upper strap 9 and a lower strap 10 are fixedly installed outside the opening of the outer mask 1; an adjusting component, which is fixedly installed at one end of the upper strap 9 and the lower strap 10, and the adjusting component is used to adjust the lengths of the upper strap 9 and the lower strap 10; when in use, first press the inner mask 2 to fit the facial contour of the user, then put the upper strap 9 and the lower strap 10 on the head, and by adjusting the adjusting component, the upper strap 9 and the lower strap 10 are gradually tightened. At this time, the upper strap 9 and the lower strap 10 drive the outer mask 1 to press the inner mask 2 against the face of the user. Due to the horn air cushion 8, under the pressure of the outer mask 1, the horn air cushion 8 presses the parts of the inner mask 2 that are not easily fitted to the face tightly, so that the inner mask 2 fits closely to the face of the user. At the same time, because the elasticity of the horn air cushion 8 is not strong, when the upper strap 9 and the lower strap 10 are tightened excessively, it will not cause excessive pressure on the inner mask 2. Compared with the prior art, it not only has stronger adaptability to the faces of different users, but also can prevent excessive tightening from pressing on the faces of users, making the wearing comfort better.

[0024] As Figure 1 and Figure 2As shown in the figure, air inlet valve ports 3 are threadedly installed on both sides of the outer mask 1. A filter element and a check valve disc are arranged inside the air inlet valve port 3. An air outlet valve port 4 is threadedly installed at the bottom of the outer mask 1, and a check valve disc is arranged inside the air outlet valve port 4. A strap seat 5 is fixedly installed on the outer side of the opening of the outer mask 1. The strap seats 5 are evenly distributed on the outer edge of the opening of the outer mask 1. The two sets of strap seats 5 at the uppermost position are fixedly connected to one end of the upper strap 9. One end of the lower strap 10 leads out two straps through a triangular buckle, and the ends of the straps are respectively fixedly connected to the four sets of strap seats 5 located below. An outer mask edge trim 6 is fixedly arranged at the opening edge of the outer mask 1, and the outer mask edge trim 6 is made of hard plastic. Through the threadedly connected air inlet valve port 3 and air outlet valve port 4, it is convenient to disassemble and clean the device. Through the evenly distributed strap seats 5, comprehensive pulling force can be provided to the outer mask 1 during wearing, making it more stable during wearing. At the same time, by setting the upper strap 9 and the lower strap 10 to pull the strap seats 5, the user's ears are avoided, preventing the user's ears from experiencing pain during long-term wearing, and making the comfort of the mask better during long-term wearing.

[0025] As Figure 1 and Figure 2 shown, the inner mask 2 is fixedly installed on the inner side of the opening of the outer mask 1. The inner mask 2 extends outward and exceeds the opening of the outer mask 1 by a certain distance. An inner mask edge trim 7 is arranged at one side opening of the inner mask 2. Both the inner mask 2 and the inner mask edge trim 7 are made of soft rubber. A wire is fixedly arranged inside the inner mask edge trim 7. The shape of the inner mask edge trim 7 is adapted to the human face. The inner mask 2 is made of soft rubber material, which can deform while ensuring airtightness. Due to the wire inside the set inner mask edge trim 7, the inner mask edge trim 7 can be deformed by pressing to fit the user's face. The inner mask edge trim 7 is also made of soft rubber material, which can make the comfort higher while ensuring airtightness when fitting the user's face.

[0026] As Figure 1 , Figure 2 and Figure 5As shown, the horn-shaped air cushion 8 is horn-shaped. There is a crease in the middle of the horn-shaped air cushion 8. An airbag is arranged inside the horn-shaped air cushion 8. One end of the horn-shaped air cushion 8 is fixedly installed on the convex parts corresponding to the nose wing, cheek and chin on the inner cover edge 7. The other end of the horn-shaped air cushion 8 is fixedly connected to the outer cover edge 6; the human face is elastic. After the inner cover edge 7 is deformed by pressing and fits with the user's face, the elasticity of the face will cause gaps to appear at the nose wing, cheek and chin of the inner cover edge 7, thus destroying the airtightness of the mask. The horn-shaped air cushion 8 fixedly installed on the inner cover edge 7 is used to press the gaps generated between the inner cover edge 7 and the face, so that the inner cover edge 7 is completely attached to the face. At the same time, the elasticity of the horn-shaped air cushion 8 is not strong, and when the upper strap 9 and the lower strap 10 are tightened too much, it will not cause excessive pressure on the user's face. Compared with the prior art, it has stronger adaptability to the faces of different users, and can prevent excessive tightening from pressing on the user's face, making the wearing comfort better.

[0027] As Figure 1 , Figure 3 and Figure 4 shown, the adjusting component includes an adjusting seat 11 sleeved and installed on the upper strap 9 and the lower strap 10. A sponge is fixedly arranged on one side of the adjusting seat 11. There is an arc on one side of the sponge. An upper buckle 12 and a lower buckle 13 are fixedly installed on one side of the adjusting seat 11. A rotating shaft 14 is rotatably installed on one side of the adjusting seat 11. The upper strap 9 passes through the upper buckle 12 and is fixedly connected to the rotating shaft 14. The lower strap 10 passes through the lower buckle 13 and is fixedly connected to the rotating shaft 14. An adjusting wheel 15 is fixedly installed in the middle of the rotating shaft 14. A ratchet 16 is fixedly arranged in the middle of the adjusting wheel 15. A pawl 17 is slidably installed on one side of the adjusting seat 11. The pawl 17 is adapted to the ratchet 16. One side of the pawl 17 is connected to the adjusting seat 11 through a spring; through the cooperation of the ratchet 16 and the pawl 17, after the user wears it, only need to turn the adjusting wheel 15 at the back of the head to tighten the upper strap 9 and the lower strap 10. When it is necessary to loosen the upper strap 9 and the lower strap 10 to take off the mask, only need to push the pawl 17 to make the rotating shaft 14 resume rotation. Compared with the prior art, the adjustment of the upper strap 9 and the lower strap 10 is simpler and more convenient, and because the adjusting seat 11 fits with the back of the user's head, the contact area with the user's head is increased, and the pressure of the upper strap 9 and the lower strap 10 on the user's head is reduced, making the use comfort better.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adjustable half mask, characterized in that: include: An outer mask (1) is fixedly mounted at the opening of the outer mask (1) with an inner mask (2), the inner mask (2) being used to fit the face of a wearer, a horn air cushion (8) being fixedly mounted on the inner mask (2), the other end of the horn air cushion (8) being fixedly connected to the outer mask (1), an upper strap (9) and a lower strap (10) being fixedly mounted on the outer side of the opening of the outer mask (1), an inner mask edging (7) being provided at one side of the opening of the inner mask (2), an iron wire being fixedly mounted inside the inner mask edging (7), the shape of the inner mask edging (7) being adapted to the face of a person; an adjustment component, fixedly mounted at one end of the upper strap (9) and the lower strap (10), the adjustment component being used to adjust the length of the upper strap (9) and the lower strap (10).

2. An adjustable half mask according to claim 1, characterized in that: Both sides of the outer cover (1) are threadedly mounted with air inlet valve ports (3), the interior of the air inlet valve ports (3) is provided with a filter element and a one-way valve plate, the bottom of the outer cover (1) is threadedly mounted with an air outlet valve port (4), the interior of the air outlet valve port (4) is provided with a one-way valve plate, a strap seat (5) is fixedly mounted on the outside of the opening of the outer cover (1), and an outer cover edging (6) is fixedly mounted on the edge of the opening of the outer cover (1), and the outer cover edging (6) is made of hard plastic.

3. An adjustable half mask according to claim 1, characterized in that: The inner mask (2) is fixedly mounted on the inner side of the opening of the outer mask (1), and the inner mask (2) extends outwards and exceeds the distance of one end of the opening of the outer mask (1).

4. An adjustable half mask according to claim 2, characterized in that: The ox-horn air cushion (8) has an outer shape of an ox-horn, a fold is provided in the middle of the ox-horn air cushion (8), an air bag is provided inside the ox-horn air cushion (8), one end of the ox-horn air cushion (8) is fixedly mounted on a protrusion on the inner cover edge (7) corresponding to the nose wing, cheek and chin, and the other end of the ox-horn air cushion (8) is fixedly connected to the outer cover edge (6).

5. The adjustable half mask according to claim 1, characterized in that: The adjustment assembly comprises an adjustment seat (11) sleeved on an upper strap (9) and a lower strap (10); a sponge is fixedly arranged on one side of the adjustment seat (11); a curvature is arranged on one side of the sponge; an upper buckle (12) and a lower buckle (13) are fixedly arranged on one side of the adjustment seat (11); a rotating shaft (14) is rotatably arranged on one side of the adjustment seat (11); the upper strap (9) passes through the upper buckle (12) and is fixedly connected to the rotating shaft (14); the lower strap (10) passes through the lower buckle (13) and is fixedly connected to the rotating shaft (14); an adjustment wheel (15) is fixedly arranged in the middle of the rotating shaft (14); a ratchet (16) is fixedly arranged in the middle of the adjustment wheel (15); a pawl (17) is slidably arranged on one side of the adjustment seat (11); the pawl (17) is adapted to the ratchet (16); and one side of the pawl (17) is connected to the adjustment seat (11) via a spring.

6. The adjustable half mask according to claim 1, characterized in that: The inner face mask (2) and the inner face mask edging (7) are both made of soft rubber.

7. An adjustable half mask according to claim 2, characterized in that: The strap seats (5) are evenly distributed on the outer edge of the opening of the outer cover (1); the two groups of strap seats (5) located at the top are fixedly connected to one end of the upper strap (9); one end of the lower strap (10) leads to two straps through a triangular buckle; the ends of the straps are respectively fixedly connected to the four groups of strap seats (5) located below.

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