A dust mask with high comfort

Abstract

This invention proposes a highly comfortable dustproof face mask, comprising a mask body. The surface of the mask body has a forward-arched arc-shaped surface corresponding to the area below the wearer's nostrils and above the chin. Three exhaust channels are arranged on the arc-shaped surface, distributed to the left, center, and right. An exhaust structure is slidably disposed on the arc-shaped surface, capable of connecting to one of the exhaust channels. When the exhaust structure is connected to one exhaust channel, the other two exhaust channels are closed. An air intake channel is provided at the rear ends of both sides of the mask body, and an air intake structure for intake is provided at the rear ends of both sides of the mask body to allow air to enter through the air intake vents. This invention allows the exhaust structure to be adjusted to connect to a suitable exhaust channel according to the location of facial heat and moisture, changing the airflow direction within the mask body, improving the efficiency of removing hot and humid air and sweat, and enhancing dryness and comfort.

Description

Technical Field

[0001] This invention relates to the field of dust mask technology, and more specifically to a highly comfortable dust mask. Background Technology

[0002] When working in coal mines or underground, workers need to wear dust masks to avoid inhaling large amounts of dust and causing physical harm. However, the large amount of hot and humid air produced during respiration can cause discomfort and a feeling of stuffiness in the mask area. Combined with the physical exertion that causes workers to sweat, this creates a hot and humid environment inside the mask, making prolonged wear extremely uncomfortable. To address this issue and reduce the feeling of stuffiness, current technologies typically increase the airflow into and out of the mask to quickly remove the hot and humid air and replenish sufficient oxygen.

[0003] For example, patent application number 202310869568.6 provides an air purification device for indoor decoration, including an elastic sealing gasket, a central mask, a transition elbow, an air intake multiplier mechanism, and an exhaust multiplier mechanism. The central mask is disposed on the elastic sealing gasket, the transition elbows are symmetrically disposed on both sides of the central mask, the air intake multiplier mechanism is disposed on one of the transition elbows, and the exhaust multiplier mechanism is disposed on the transition elbow at the end away from the air intake multiplier mechanism. This invention increases the gas flow rate inside the dust mask through the air intake multiplier mechanism and the exhaust multiplier mechanism, allowing the wearer to receive more fresh air. At the same time, the high-velocity gas carries away exhaled moisture and heat, reducing the temperature and humidity inside the dust mask and ensuring the wearer's face remains dry.

[0004] The above-mentioned measures improve the airflow and velocity by adding an air intake multiplier and an exhaust multiplier, thereby expelling the hot and humid air inside the mask more quickly and replenishing it with fresh air in a timely manner to enhance the drying effect.

[0005] However, in the above scheme, fresh air enters from a fixed side and exits from the other side. In this way, the airflow direction inside the cover is fixed, and there will be some residual humid and hot air produced by breathing. In particular, the cheek area of ​​the wearer is close to the exhaust side. Since it cannot be directly blown by fresh air, it is very easy for sweat and humid and hot air to accumulate, causing discomfort. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a highly comfortable dustproof face mask.

[0007] The technical solution of this invention is implemented as follows:

[0008] A comfortable dustproof face mask includes a mask body. The surface of the mask body has a front-arched arc-shaped surface corresponding to the area below the wearer's nostrils and above the chin. The arc-shaped surface has three exhaust channels distributed on the left, center, and right. An exhaust structure is slidably disposed on the arc-shaped surface and can be connected to one of the exhaust channels. When the exhaust structure is connected to one of the exhaust channels, the other two exhaust channels are closed. The rear ends of both sides of the mask body have a row of air intake channels, and the rear ends of both sides of the mask body have air intake structures for air intake.

[0009] Furthermore, air intake hoods are provided on both sides of the cover, the air intake structure is connected to the surface of the air intake hood, an air intake cavity is formed between the air intake hood and the cover, and the air intake end of the air intake hole is located in the air intake cavity.

[0010] Furthermore, the air intake structure includes an air intake pipe and an air intake fan installed at the bottom of the air intake pipe, and the exhaust structure includes an exhaust pipe and an exhaust fan installed at the bottom of the exhaust pipe.

[0011] Furthermore, the exhaust channel includes a plurality of exhaust holes arranged in a circular array and a rotating plate. The rotating plate is circular and its center is rotatably mounted on the cover. The surface of the rotating plate is provided with through holes adapted to the exhaust holes. The rotating plate opens or closes the exhaust holes by rotating.

[0012] Furthermore, the outer side of the rotating plate is provided with two limiting grooves that are symmetrically distributed vertically. One end of the limiting groove is an open end and the other end is a closed end. The closed end is located on the diameter line of the rotating plate. The rear end of the exhaust structure is provided with a rotating ring. The rear end surface of the rotating ring is provided with two first limiting protrusions corresponding to the limiting grooves. When the open end is tilted upward, the rotating plate closes the exhaust channel. When the open end is horizontal and facing the exhaust structure, the first limiting protrusions can enter the limiting groove from the open end.

[0013] Furthermore, the front side of the cover is provided with an arc-shaped channel, and the rear end of the rotating ring is rotatably fitted with an arc-shaped slider. The arc-shaped slider slides in conjunction with the arc-shaped channel, and the rear end face of the arc-shaped slider fits against the cover.

[0014] Furthermore, a first arc-shaped groove for sliding the first limiting protrusion is provided on the inner wall of the rear end of the arc-shaped channel. A second limiting protrusion is provided on both sides of the center of the rear end face of the rotating ring and the front end face of the arc-shaped slider. A second arc-shaped groove for sliding the second limiting protrusion is provided on the inner wall of the rear side of the arc-shaped groove. The second arc-shaped groove is at the same height as the center of the rotating plate, and the width and depth of the limiting groove, the first arc-shaped groove and the second arc-shaped groove are the same.

[0015] Furthermore, the air intake channel includes an air intake hole and a sealing plate. The air intake holes are equidistantly located at the rear end of the side of the cover in the height direction. The air intake holes are inclined with the air outlet facing the arc-shaped surface. The sealing plate is slidably installed inside the cover. The sealing plate blocks the air outlet of the air intake hole by moving backward. When the exhaust structure is connected to the exhaust channel on the left or right side, it pushes the sealing plate located on the left or right side to block the air intake hole on the corresponding side.

[0016] Furthermore, the air intake structure is provided with a side top plate, and a storage spring is provided between the sealing plate and the cover. The storage spring is used to keep the sealing plate in a state separated from the air intake hole. When the air intake structure is connected to the exhaust channel located on the left or right side, the sealing plate drives the sealing plate located on the left or right side to move backward to block the air intake hole on the corresponding side.

[0017] Furthermore, both ends of the arc-shaped channel are provided with through slots for the end of the side top plate to be inserted into and squeeze the sealing plate. When the air inlet is open, the front end face of the sealing plate blocks the rear end slot of the through slot.

[0018] The present invention has the following beneficial effects:

[0019] By setting exhaust channels on the left, center, and right sides of the mask, and by setting an exhaust structure that can be moved to connect to the three exhaust channels respectively, the direction of airflow inside the mask can be changed. The wearer can adjust the position of the exhaust structure according to the feeling of heat and moisture on the cheeks, and specifically expel the heat and moisture from the heat and moisture areas, and blow away the sweat on the cheeks through the airflow, thereby improving dryness and comfort. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the highly comfortable dustproof face mask of the present invention;

[0022] Figure 2 This is the present invention. Figure 1 Enlarged view of point A;

[0023] Figure 3 This is the present invention. Figure 1 Another perspective view;

[0024] Figure 4This is a split diagram of the highly comfortable dustproof face mask of the present invention;

[0025] Figure 5 This is the present invention. Figure 4 Enlarged view of point B;

[0026] Figure 6 This is the present invention. Figure 4 Enlarged view of point C;

[0027] Figure 7 This is the present invention. Figure 4 Enlarged view of point D;

[0028] Figure 8 This is a schematic diagram of the exhaust structure and rotating plate of the present invention;

[0029] Figure 9 This is a schematic diagram of the exhaust structure of the present invention.

[0030] In the diagram: 1. Cover; 2. Arc-shaped surface; 3. Air intake cover; 4. Air intake pipe; 5. Air intake fan; 6. Exhaust pipe; 7. Exhaust fan; 8. Exhaust port; 9. Rotating plate; 10. Through hole; 11. Limiting groove; 12. Rotating ring; 13. First limiting protrusion; 14. Arc-shaped channel; 15. Arc-shaped slider; 16. First arc-shaped slide groove; 17. Second limiting protrusion; 18. Second arc-shaped slide groove; 19. Air intake port; 20. Sealing plate; 21. Side top plate; 22. Energy storage spring; 23. Through groove. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0032] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0033] In addition, in the description of this application, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0034] like Figures 1 to 9 As shown, a typical embodiment of the present invention provides a highly comfortable dustproof mask, including a mask body 1. The surface of the mask body 1 is provided with a front-arched arc-shaped surface 2 corresponding to the part below the wearer's nostrils and above the chin. Three exhaust channels are provided on the arc-shaped surface 2, distributed on the left, center and right. An exhaust structure that can be connected to one of the exhaust channels is slidably provided on the arc-shaped surface 2. When the exhaust structure is connected to one of the exhaust channels, the other two exhaust channels are closed. A row of air intake channels is provided at the rear ends of both sides of the mask body 1, and an air intake structure for air intake holes 19 is provided at the rear ends of both sides of the mask body 1.

[0035] In this embodiment, after being filtered by the air intake structure, the air enters the cover 1 through the air intake channel for the wearer to breathe, and then exits through the exhaust channel and exhaust structure. During this process, the air inside the cover 1 enters from both sides of the wearer's cheeks and exits through the exhaust channel on the curved surface 2.

[0036] When wearing this comfortable dustproof mask, the wearer can adjust the position of the exhaust mechanism according to their sensation of temperature and humidity in different parts of the mask 1. The exhaust structure is connected to three exhaust channels located on the left, center, and right to change the direction of airflow in the mask 1 and the area where the air sweeps across the wearer's cheeks. This allows for the timely expulsion of air from areas of excessive temperature and humidity that cause discomfort, and the air sweeping across different areas of the cheeks helps to dry sweat in a timely manner, thus improving comfort.

[0037] The air intake structure includes an air intake pipe 4 and an air intake fan 5 installed at the bottom of the air intake pipe 4, while the exhaust structure includes an exhaust pipe 6 and an exhaust fan 7 installed at the bottom of the exhaust pipe 6. The air intake structure increases the air intake volume, and the exhaust structure increases the exhaust volume. This, in turn, increases the airflow and velocity within the cover 1, improving the blowing effect. Simultaneously, by utilizing the higher airflow and velocity, the air produced by the wearer's breathing is promptly directed to the exhaust channel connected to the exhaust structure, further enhancing air circulation. Specifically, filters or filter components can be installed in both the air intake pipe 4 and the exhaust pipe 6; this is existing technology and will not be elaborated upon here.

[0038] Based on this, the exhaust channel includes multiple exhaust holes 8 arranged in a circular array and a rotating plate 9. The rotating plate 9 is circular and is rotatably mounted on the cover 1. The surface of the rotating plate 9 is provided with through holes 10 that are adapted to the exhaust holes 8. The rotating plate 9 opens or closes the exhaust holes 8 by rotating.

[0039] In this embodiment, by rotating the rotating plate 9, the through hole 10 is aligned with the exhaust hole 8, which makes the exhaust channel open. Conversely, when the through hole 10 and the exhaust hole 8 are misaligned, the exhaust channel is closed.

[0040] Specifically, the outer side of the rotating plate 9 is provided with two limiting grooves 11 that are symmetrically distributed vertically. One end of the limiting groove 11 is an open end and the other end is a closed end. The closed end is located on the diameter line of the rotating plate 9. The rear end of the exhaust structure is provided with a rotating ring 12. The rear end surface of the rotating ring 12 is provided with two first limiting protrusions 13 corresponding to the limiting grooves 11. When the open end is tilted upward, the rotating plate 9 closes the exhaust passage. When the open end is horizontal and facing the exhaust structure, the first limiting protrusions 13 can enter the limiting groove 11 from the open end.

[0041] In this embodiment, when the exhaust structure is moved, after the first limiting protrusion 13 moves laterally with the rotating ring 12 and enters the limiting groove 11 on one of the rotating plates 9, the first limiting protrusion 13 drives the rotating plate 9 to rotate by rotating the rotating ring 12, thereby controlling the exhaust passage connected to the exhaust structure to be in an open or closed state.

[0042] When the rotating ring 12 is fixedly connected to the front end of the exhaust pipe 6 and the exhaust passage connected to the exhaust structure is in the open state, the exhaust fan 7 is located at the bottom of the exhaust pipe 6. In this way, by utilizing the eccentric effect of the exhaust fan 7 relative to the rotating ring 12, the exhaust pipe 6 and the rotating ring 12 are better stabilized, thereby enabling the exhaust passage to be more stable in the open state.

[0043] When the exhaust passage is open, the open end of the limiting groove 11 is tilted upward, so that the limiting groove 11 achieves the effect of limiting the exhaust structure by limiting the first limiting protrusion 13.

[0044] Furthermore, an arc-shaped channel 14 is provided on the front side of the cover 1, and an arc-shaped slider 15 is rotatably sleeved on the rear end of the rotating ring 12. The arc-shaped slider 15 slides in cooperation with the arc-shaped channel 14, and the rear end face of the arc-shaped slider 15 is in contact with the cover 1.

[0045] In this embodiment, the exhaust hole 8 is opened on the inner wall of the rear end of the arc-shaped channel 14. The front end of the arc-shaped channel 14 is open. The inner walls of the upper and lower ends of the arc-shaped channel 14 are respectively concave upward and downward. The top and bottom ends of the arc-shaped slider 15 are respectively slidably sleeved on the upper and lower ends of the open arc-shaped channel 14.

[0046] The arc-shaped slider 15 is in contact with the inner rear wall of the arc-shaped channel 14, which limits the arc-shaped slider 15. As the rotating ring 12 rotates, the arc-shaped slider 15 remains stationary and seals the exhaust hole 8 around it by contacting the inner rear wall of the arc-shaped channel 14 to ensure airtightness.

[0047] Specifically, in this embodiment, the inner rear wall of the arc-shaped channel 14 is provided with a central groove for accommodating the rotating plate 9, and the vent 8 is located within the central groove. The inner rear wall of the central groove, the rear rear surface of the rotating ring 12, and the rear rear surface of the rotating plate 9 are all planar. The front end surface of the rotating plate 9 is configured as an arc-shaped surface 2 that matches the inner rear wall of the arc-shaped channel 14. The arc-shaped slider 15 seals the lateral gap between the front end surface of the rotating plate 9 and the rear end surface of the rotating ring 12.

[0048] Based on this, a first arc-shaped groove 16 for sliding the first limiting protrusion 13 is provided on the inner wall of the rear end of the arc-shaped channel 14. A second limiting protrusion 17 is provided on both sides of the center of the rear end face of the rotating ring 12 and the front side face of the arc-shaped slider 15. A second arc-shaped groove 18 for sliding the second limiting protrusion 17 is provided on the inner wall of the rear end of the arc-shaped groove and the center of the front side face of the rotating ring 12. The second arc-shaped groove 18 is at the same height as the center of the rotating plate 9, and the width and depth of the limiting groove 11, the first arc-shaped groove 16 and the second arc-shaped groove 18 are the same.

[0049] In this embodiment, when the exhaust structure moves on the arc-shaped surface 2, the first limiting protrusion 13 moves within the first arc-shaped groove 16. When the exhaust port 8 is closed by the rotating plate 9, the open end of the limiting groove 11 communicates with the first arc-shaped groove 16 on its open side, allowing the first limiting protrusion 13 to enter the limiting groove 11 from the first arc-shaped groove 16. Similarly, the first limiting protrusion 13 can enter the first arc-shaped through groove 23 from the limiting groove 11 to leave the limiting groove 11. When the exhaust port 8 is open, the limiting groove 11 and the first arc-shaped groove 16 are misaligned. The first arc-shaped groove 16 can maintain the position of the first limiting protrusion 13 in the circumferential direction of the rotating ring 12, ensuring that the first limiting protrusion 13 can smoothly enter the limiting groove 11, thereby enabling the exhaust structure to connect with the three exhaust channels located on the left, middle, and right respectively.

[0050] When the exhaust structure moves within the arc-shaped channel 14, the second limiting protrusion 17 moves within the second arc-shaped groove 18. The second arc-shaped groove 18 limits the second limiting protrusion 17 in the circumferential direction of the rotating ring 12, thereby improving the locking effect of the arc-shaped slider 15 in the circumferential direction.

[0051] Furthermore, the second arc-shaped groove 18 on the front side of the rotating plate 9 is continuous and communicates with the second arc-shaped groove 18 on the inner wall of the rear end of the arc-shaped channel 14. During the process of the first limiting protrusion 13 leaving the rotating plate 9, the second limiting protrusion 17 at the front end of the rotating ring 12 moves through the second arc-shaped groove 18 on the front side of the rotating ring 12 to the second arc-shaped groove 18 on the rear end of the arc-shaped channel 14, and the first lower protrusion enters the first arc-shaped groove 16 from the limiting groove 11. During this process, the first limiting protrusion 13 and the second limiting protrusion 17 can enter the first arc-shaped groove 16 and the second arc-shaped groove 18 on the inner wall of the rear end of the arc-shaped channel 14 respectively, so that the rotating plate 9 can be restored to its initial state and the exhaust port 8 is blocked by the rotating plate 9.

[0052] The air intake channel includes an air intake hole 19 and a sealing plate 20. The air intake hole 19 is equidistantly opened at the rear end of the side of the cover 1 in the height direction. The air intake hole 19 is inclined with the air outlet facing the arc-shaped surface 2. The sealing plate 20 is slidably installed inside the cover 1. The sealing plate 20 blocks the air outlet of the air intake hole 19 by moving backward. When the exhaust structure is connected to the exhaust channel on the left or right side, the sealing plate 20 located on the left or right side is pushed to block the air intake hole 19 on the corresponding side.

[0053] The air inlet 19 in this embodiment is designed so that the air entering through the air inlet 19 will move in the direction of the arc-shaped surface 2, which will better provide oxygen for the wearer's breathing and improve the air exhaust effect inside the cover 1.

[0054] The sealing plate 20 ensures that when the exhaust structure is connected to the exhaust channel in the middle, the exhaust holes 8 on both sides of the mask 1 are open. At this time, air enters evenly from both sides of the wearer's cheeks, causing the air inside the mask to converge and circulate from both sides to the middle of the arc surface 2. Combined with the air flow direction when the wearer exhales, it can expel the moisture generated by breathing more quickly, improve the dryness of the environment inside the mask 1, and improve the wearing comfort.

[0055] When the exhaust structure is connected to the exhaust channel on the left, the left-side sealing plate 20 closes the left-side air inlet 19. At this time, air enters the cover 1 through the right-side air inlet 19. After sweeping across the wearer's right cheek, the air passes through the wearer's nostrils and the front of the mouth before moving to the left and finally exiting through the left-side exhaust channel. This effectively dries the humid and hot environment on the right and central sides of the cover 1 and removes moisture promptly. Simultaneously, the air entering the cover 1 effectively passes through the wearer's mouth and nose, providing sufficient oxygen and reducing the feeling of suffocation. Furthermore, the airflow directly dries the right cheek, effectively wicking away sweat. The same effect is achieved when the exhaust structure is connected to the right-side exhaust channel.

[0056] Based on this, a side top plate 21 is provided on the air intake structure, and a storage spring 22 is provided between the sealing plate 20 and the cover 1. The storage spring 22 is used to keep the sealing plate 20 in a state separated from the air intake hole 19. When the air intake structure is connected to the exhaust channel located on the left or right side, the sealing plate 20 drives the sealing plate 20 located on the left or right side to move backward to block the air intake hole 19 on the corresponding side.

[0057] In this embodiment, the energy storage spring 22 is located inside the air intake chamber, and the side top plate 21 moves synchronously with the exhaust structure. Especially when the exhaust structure is connected to the exhaust channel located on the left or right side, the left or right end of the side top plate 21 will push the sealing plate 20 located on the left or right side backward, thereby blocking the air intake 19 located on the left or right side, respectively. In the initial state, the sealing plate 20 is separated from the side top plate 21, and the elastic force of the energy storage spring 22 makes the sealing plate 20 located at the foremost position within its movement stroke, so that the air intake 19 is open.

[0058] Furthermore, both ends of the arc-shaped channel 14 are provided with through slots 23 for the end of the side top plate 21 to insert and press against the sealing plate 20. When the air inlet 19 is open, the front end of the sealing plate 20 blocks the rear end of the through slot 23. This arrangement allows the sealing plate 20 to block the through slot 23 in the initial state, thus ensuring the separation of the inner cavity of the cover 1 from the external environment. Of course, in this embodiment, in order to improve the separation effect between the inner cavity of the cover 1 and the external environment, a sealing gasket or silicone gasket can be provided at the rear edge of the cover 1 so that the rear end of the cover 1 can better fit the wearer's face and improve the dustproof effect. In addition, in order to improve the sealing effect of the sealing plate 20 on the through slot 23, a sealing gasket can also be provided at the front end of the sealing plate 20 so that the sealing gasket can better block the channel under the action of the storage spring 22. The above-mentioned methods for improving the airtightness of the cover 1 are all existing technologies and are not intended to limit this embodiment. Those skilled in the art can set the size and shape of the sealing gasket according to the actual situation, which will not be elaborated here.

[0059] The above embodiments are only used to illustrate the embodiments of this application, and are not intended to limit the embodiments of this application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of this application. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of this application, and the patent protection scope of the embodiments of this application should be defined by the claims.

Claims

1. A comfortable dustproof face mask, comprising a mask body (1), characterized in that, The surface of the cover (1) is provided with an arc-shaped surface (2) with a front arch corresponding to the part below the nostrils and above the chin of the wearer. The arc-shaped surface (2) is provided with three exhaust channels distributed on the left, middle and right. An exhaust structure that can be connected to one of the exhaust channels is slidably provided on the arc-shaped surface (2). When the exhaust structure is connected to one of the exhaust channels, the other two exhaust channels are closed. A row of air intake channels is provided at the rear ends of both sides of the cover (1). An air intake structure for air intake of the air intake hole (19) is provided at the rear ends of both sides of the cover (1). The exhaust channel includes a plurality of exhaust holes (8) arranged in a circular array and a rotating plate (9). The rotating plate (9) is circular and is rotatably mounted on the cover (1) at its center. The surface of the rotating plate (9) is provided with through holes (10) that are adapted to the exhaust holes (8). The rotating plate (9) opens or closes the exhaust holes (8) by rotating. The rotating plate (9) has two limiting grooves (11) symmetrically distributed on its outer side. One end of the limiting groove (11) is an open end and the other end is a closed end. The closed end is located on the diameter line of the rotating plate (9). The rear end of the exhaust structure is provided with a rotating ring (12). The rear end surface of the rotating ring (12) is provided with two first limiting protrusions (13) corresponding to the limiting grooves (11). When the open end is tilted upward, the rotating plate (9) closes the exhaust channel. When the open end is horizontal and facing the exhaust structure, the first limiting protrusions (13) can enter the limiting groove (11) from the open end. The front side of the cover (1) is provided with an arc-shaped channel (14), and the rear end of the rotating ring (12) is rotatably fitted with an arc-shaped slider (15). The arc-shaped slider (15) slides with the arc-shaped channel (14), and the rear end face of the arc-shaped slider (15) is in contact with the cover (1). The inner wall of the arc-shaped channel (14) is provided with a first arc-shaped groove (16) for sliding the first limiting protrusion (13). The center of the rear end face of the rotating ring (12) and both sides of the front end face of the arc-shaped slider (15) are provided with second limiting protrusions (17). The inner wall of the arc-shaped groove is provided with a second arc-shaped groove (18) for sliding the second limiting protrusion (17). The second arc-shaped groove (18) is at the same height as the center of the rotating plate (9), and the width and depth of the limiting groove (11), the first arc-shaped groove (16) and the second arc-shaped groove (18) are the same. The air intake channel includes an air intake hole (19) and a sealing plate (20). The air intake hole (19) is equidistantly opened at the rear end of the side of the cover (1) in the height direction. The air intake hole (19) is inclined with the air outlet facing the arc surface (2). The sealing plate (20) is slidably installed inside the cover (1). The sealing plate (20) blocks the air outlet of the air intake hole (19) by moving backward. When the exhaust structure is connected to the exhaust channel on the left or right side, the sealing plate (20) located on the left or right side is pushed to block the air intake hole (19) on the corresponding side.

2. The highly comfortable dustproof face mask according to claim 1, characterized in that, Both sides of the cover (1) are provided with air intake hoods (3), the air intake structure is connected to the surface of the air intake hood (3), an air intake cavity is formed between the air intake hood (3) and the cover (1), and the air intake end of the air intake hole (19) is located in the air intake cavity.

3. The highly comfortable dustproof face mask according to claim 1, characterized in that, The air intake structure includes an air intake pipe (4) and an air intake fan (5) installed at the bottom of the air intake pipe (4), and the exhaust structure includes an exhaust pipe (6) and an exhaust fan (7) installed at the bottom of the exhaust pipe (6).

4. The highly comfortable dustproof face mask according to claim 1, characterized in that, The air intake structure is provided with a side top plate (21), and a storage spring (22) is provided between the sealing plate (20) and the cover (1). The storage spring (22) is used to keep the sealing plate (20) separated from the air intake hole (19). When the air intake structure is connected to the exhaust channel located on the left or right side, the sealing plate (20) drives the sealing plate (20) located on the left or right side to move backward to block the air intake hole (19) on the corresponding side.

5. A highly comfortable dustproof face mask according to claim 4, characterized in that, Both ends of the arc-shaped channel (14) are provided with through grooves (23) for the end of the side top plate (21) to be inserted into and squeeze the sealing plate (20). When the air inlet (19) is open, the front end of the sealing plate (20) blocks the rear end of the through groove (23).

Images