CN111135495A - Discharge valve for mask, mask with the discharge valve, and strap part of the mask - Google Patents

Abstract

The invention discloses a discharge valve for a mask and a mask with the same. The discharge valve for the mask of the present invention is formed as a one-way discharge valve in an openable and closable manner, and is opened when exhaling, so that exhaled air can be effectively discharged to the outside of the mask body, and is closed when inhaling, thereby blocking inflow of external air containing harmful substances into the mask interior. The technical problems that the separation blade of the existing discharge valve blocks effective discharge of exhaled air, the discharge valve is easy to wet, dust is easy to adhere to the discharge valve, bacteria are bred, and peculiar smell is generated are solved.

Description

Discharge valve for mask, mask with the discharge valve, and strap part of the mask

Technical Field

The invention relates to the technical field of articles for daily use, in particular to a discharge valve for a mask and the mask with the discharge valve.

Background

In recent years, harmful substances such as fine particulate matters (ultrafine particulate matters), heavy metal harmful substances, nitrogen compounds and the like emitted from automobiles and/or industrial sites have been increased more than ever, and in addition, air contains some allergic substances such as pollen, and these air quality problems have become social hotspots.

If the above-mentioned harmful substances (yellow sand, fine particles, ultrafine particles, various harmful particles, etc.) are inhaled into the body through the mouth or the respirator, not only fatal diseases of the lung can be caused, but also the harmful substances can be the root cause of respiratory diseases such as asthma, and pollen allergy can be caused if allergic substances such as pollen in the air are inhaled for people who are easy to be allergic. It is common to wear a mask having a function of filtering such harmful substances.

A mask having a function of filtering out such harmful and/or allergic substances generally includes a mask body, a filter part, and a discharge valve.

Present discharge valve is fixed in on the gauze mask main part, and current discharge valve not only discharges the gas of exhaling, also can inhale partial air through the discharge valve when breathing in, for reducing from the inspiratory air of discharge valve, be fixed with the separation blade on discharge valve usually, however, when the wearer exhales through the discharge valve, the separation blade hinders the effective discharge of exhaling gas, because the expired gas humidity is great, discharge valve department is moist easily, and then easy adhesion dust, breed the bacterium, produce the peculiar smell.

Disclosure of Invention

(problems to be solved by the invention)

The invention provides a discharge valve for a mask and the mask with the same, and aims to solve the problems that due to high humidity of exhaled waste gas, the position of the discharge valve is easy to be wet, dust is easy to adhere to the discharge valve, bacteria are bred, and peculiar smell is generated.

Other objects and advantages of the present invention will be understood by the following description, and by one embodiment of the present invention. Further, the objects and advantages of the present invention can be realized by the means recited in the claims and combinations thereof.

(measures taken to solve the problems)

In order to achieve the above object, a discharge valve for a mask according to the present invention includes: an inner discharge casing, an outer discharge casing, and a swing member; an internal discharge port is arranged on the internal discharge shell; the external discharge shell is provided with an external discharge port; the internal discharge shell and the external discharge shell are detachably connected, and the internal discharge port is communicated with the external discharge port; the swing member is located inside discharge housing with between the outside discharge housing, the swing member includes fixed part and switching part that connects each other, the switching part is located inside discharge port with between the outside discharge port, the fixed part with inside discharge housing or outside discharge housing fixed connection, or, the fixed part is fixed in inside discharge housing with between the outside discharge housing, the switching part can outside discharge port direction with swing between the inside discharge port direction, wherein, the area of switching part is not less than the area of inside discharge port just the area of switching part is not more than the area of outside discharge port.

Further, the fixed portion is located at one side of the swing member, and the opening/closing portion is connected to one side of the fixed portion. In order to better swing the opening and closing part of the swing component towards the internal discharge port and attach the opening and closing part to the internal discharge shell to completely cover the internal discharge port, the internal discharge shell is also provided with an internal inclined surface which is positioned at one side of the internal discharge shell, the internal discharge port is positioned at the other side of the internal discharge shell, and the height of the internal inclined surface close to the internal discharge port side is lower than the height far away from the internal discharge port side; the external discharge shell is also provided with an external inclined surface, the external inclined surface is positioned on one side of the external discharge shell, the external discharge port is positioned on the collar side of the external discharge shell, and the height of the external inclined surface close to the external discharge port side is lower than the height far away from the external discharge port side; the inclined angle of inside inclined plane with the inclined angle of outside is the same, the fixed part is located between inside inclined plane and the inclined plane of outside, the fixed part with inside inclined plane or the inclined plane fixed connection of outside, or, the fixed part respectively with inside inclined plane with the inclined plane of outside butt.

In order to enable the swing component to be fixed more firmly, a fixing hole is formed in the fixing portion, a first fixing groove is formed in one of the inner inclined surface and the outer inclined surface, a first fixing protrusion is formed in the other one of the inner inclined surface and the outer inclined surface, and the first fixing protrusion penetrates through the fixing hole and is clamped with the first fixing groove.

The fixed part is provided with a fixed hole, one side of one of the internal discharge shell and the external discharge shell is provided with a second fixed groove, the other side of the internal discharge shell and the external discharge shell is provided with a second fixed protrusion, and the second fixed protrusion penetrates through the fixed hole and is clamped with the second fixed groove.

In order to prevent the opening and closing part from swinging and transiting towards the inner exhaust port during air suction, a first limit fence is arranged on the inner exhaust port and divides the inner exhaust port into a plurality of sub exhaust ports.

The fixed part is located the swing part center, the switching part with the fixed part outward flange is connected, inside discharge port center is equipped with the fixed mounting portion, the fixed part with fixed mounting portion fixed connection.

In order to prevent the opening and closing part from swinging and transiting towards the direction of the external outlet during expiration, a second limiting rail is arranged on the external outlet shell, the second limiting rail stretches across the upper end and the lower end of the external outlet, and the lower side of the second limiting rail inclines towards the direction far away from the internal outlet.

The present invention also provides a mask, comprising: the mask body, the mask still includes the discharge valve, the discharge valve through set up in the discharge valve pilot hole of mask body install in the mask body. A mask body flexibly formed to shield a nose and a mouth of a mask wearer; and a discharge valve formed to be openable and closable at one side of the mask body, and opened to discharge exhaled air when the wearer exhales air.

The inside discharge casing of bleeder valve is located the gauze mask main part is inboard, the outside discharge casing of bleeder valve is located the gauze mask main part outside, inside discharge casing with outside discharge casing joint in on the bleeder valve pilot hole.

The mask further comprises a filtering part arranged on the mask body and a lacing part arranged on the mask body.

The mask main body is arranged corresponding to the position of the mouth and the nose of a wearer in an outward protruding mode, the discharge valve is arranged at the position of the mask main body in the outward protruding mode, and the filtering portion is arranged far away from the position of the discharge valve.

The utility model discloses a gauze mask, including gauze mask main part, discharge valve, filter portion, gauze mask main part downside is equipped with interior knot structure, interior knot structure and the cooperation of the person's of wearing chin position, discharge valve set up in gauze mask main part interior knot structure department, the filter portion set up in the gauze mask main part is the side.

The filtering part is arranged at the position of the mask main body close to the mouth and the nose of a wearer.

A filter part formed at one side of the mask body in a separable way to facilitate the replacement of the filter, and filtering the air flowing from the outside to make the air flow into the mask body; the filter part includes: an inner filter housing, an outer filter housing, a filter mounting portion, and a filter; the filter mounting part is positioned between the inner filter shell and the outer filter shell, and the inner filter shell and the filter mounting part are detachably connected; the external filter shell is detachably connected with the filter mounting part, and an inflow port for allowing external air to flow in is arranged on the external filter shell; the filter mounting part is provided with a first through hole, and the inner filter shell is provided with a second through hole communicated with the first through hole; the filter is located on an air flow passage between the first through-hole and the inflow port, so that air flowing in from the inflow port flows into the first through-hole via the filter.

The filter is a cylindrical filter with a hollow part, one end of the filter is abutted with the inner wall of the outer filter shell, and the other end of the filter is abutted with the inner wall of the filter mounting part facing to one side of the outer filter shell; the inlet port of the outer filter case is located above the hollow portion, and the first through-hole is located between the outer edge of the filter mounting portion and the outer edge of the filter.

The internal filtering shell and the filter mounting part are magnetically connected through a magnet.

In order to prevent the filter after installation from moving between a filter installation part and an external filter shell and changing the position, a support column protruding towards the external filter shell is arranged on one side of the filter installation part facing the external filter shell, and the hollow part of the filter is arranged in the support column in a penetrating mode.

In order to make the combination of the internal filter shell and the filter installation part firmer, a boss protruding towards the direction of the filter installation part is arranged on the internal filter shell, a first magnet is arranged on the boss, a magnet accommodating groove clamped with the boss is arranged on the filter installation part, a second magnet with the polarity opposite to that of the first magnet is arranged in the magnet accommodating groove, and a first filter accommodating groove for installing the filter is formed between the outer edge of the filter installation part and the outer edge of the bottom surface of the magnet accommodating groove.

In order to limit the filter, a second filter housing groove is provided around the inflow port on the inner wall of the outer filter housing.

The invention also provides a mask sling part, which comprises two belt fixing parts and a belt; the two belt fixing parts are connected through a connecting part; the connecting part is connected with the mask main body; the belt comprises two connecting ends, one of the connecting ends of the belt is connected with one of the belt fixing parts, and the other connecting end of the belt is connected with the other belt fixing part; the distance between the two connecting ends of the band is larger than or equal to the diameter of the ear of the wearer, wherein the diameter of the ear is the distance between the band positioned at the upper end of the ear and the band positioned at the lower end of the ear when the sling part is worn.

Furthermore, the uppermost end of the mask body is in the same horizontal height with the connecting end of the strap at the upper end and the contact part of the strap and the upper end of the ear.

Further, the belt fixing part is provided with a belt inserting hole, and the connecting end of the belt penetrates through the belt inserting hole and forms a knot for preventing the belt from falling off.

Further, a tape receiving groove recessed toward an outer side of the tape fixing portion is formed in the inner side of the tape fixing portion, and the knot is positioned in the tape receiving groove.

Further, a pocket portion is arranged on the inner side of the belt fixing portion, the pocket portion is located opposite to the belt insertion hole, and the buckle is located in the pocket portion.

Further, the connecting portion is provided with a strip-shaped hook portion connected with the mask body, the mask body is provided with a hanging strip portion assembling hole, and the strip-shaped hook portion is connected with the hanging strip portion assembling hole in a clamping mode.

Further, be equipped with a plurality of on the connecting portion with the gauze mask main part is connected protrudingly, be equipped with on the gauze mask main part with protruding complex mounting hole, protrudingly with the mounting hole block is connected, wherein, a plurality of protrudingly dispersion set up in on the connecting portion.

Further, the lower end of the strap fixing part is connected with the mask body.

Furthermore, C-shaped notches are formed above and below the connecting part respectively.

Further, the two tape fixing portions and the connecting portion are integrally formed.

Further, the strap part is integrally formed with the mask body.

(Effect of the invention)

According to the present invention, the following effects are provided: the mask comprises a one-way discharge valve which is opened and closed according to the inhalation or exhalation of a wearer, wherein when the mask wearer inhales, the opening and closing part swings towards the inner discharge port and completely covers the inner discharge port to close the discharge valve, and when exhaling, the opening and closing part swings towards the outer discharge port to open the discharge valve, and the exhaled gas is discharged through the inner discharge port, thereby blocking the inflow of external harmful air when inhaling, and effectively discharging the exhaled gas when exhaling. The separation blade of having solved current discharge valve hinders the effective discharge of expired gas, because expired gas humidity is great, and discharge valve department is moist easily, and then easy adhesion dust, breed the bacterium, produce the technical problem of peculiar smell.

Further, the following effects are provided: the inner filter casing, the outer filter casing and the filter mounting part for accommodating the filter are connected in a detachable connection mode, wherein the inner filter casing and the filter mounting part are easily separated and combined through magnetic connection of a magnet, so that the filter can be replaced more easily, and meanwhile, the inner filter casing, the outer filter casing and the filter mounting part for accommodating the filter are also easily replaced.

In the mask provided by the application, the strap is not directly connected with the mask main body, but is connected with the mask main body through a sling part. Namely, the strap is connected with two strap fixing parts of the sling part, a certain distance is arranged between the two strap fixing parts, when the distance between the two connecting ends of the strap is larger than or equal to the diameter of the ears of a wearer, the pulling force between the strap and the mask main body is shared simultaneously through the two connecting ends of the strap with a certain distance, so that the stress is more uniform, and even if the wearer speaks, the mask main body can not rotate downwards to enable the mask to slide downwards integrally along with the opening and closing of the mouth.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood from the following description by those skilled in the art to which the present invention pertains.

Drawings

Fig. 1 is an exploded perspective view of a discharge valve according to an embodiment of the present invention.

Fig. 2 is a schematic structural view illustrating a fixing portion and an internal discharge housing according to an embodiment of the present invention.

Fig. 3 is a schematic structural view illustrating a fixing portion and an external discharge housing according to an embodiment of the present invention.

Fig. 4 to 5 are sectional views of a discharge valve according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of an internal discharge housing with a first position-limiting fence according to an embodiment of the present invention.

Fig. 7 is a perspective view of a mask according to an embodiment of the present invention.

Fig. 8 is a view showing an example of wearing a mask according to an embodiment of the present invention.

Fig. 9 is a perspective view of a mask body according to an embodiment of the present invention.

Fig. 10 is a view showing an example of wearing goggles and a mask according to an embodiment of the present invention.

Fig. 11 is an exploded perspective view of a filter unit according to an embodiment of the present invention.

FIG. 12 is a perspective view of a filter mounting portion of an embodiment of the present invention.

Fig. 13 is a cross-sectional view of a filter portion according to an embodiment of the present invention.

Fig. 14 is a perspective view of a sling portion according to an embodiment of the invention;

fig. 15 is a perspective view of a sling portion according to yet another embodiment of the invention;

fig. 16 is a partially enlarged view of the connection between the fastening portion and the mask body according to still another embodiment of the present invention.

(description of reference numerals)

100: a mask body; 101: a discharge valve fitting hole; 102: a filter portion assembly hole; 103: a lacing part assembly hole; 200: a discharge valve; 210: an internal exhaust housing; 211: a first fixing groove; 212: an inner inclined surface; 213: a first limit fence; 220: an outer discharge housing; 221: a second limit fence; 222: an outer inclined surface; 223: a first fixing protrusion; 230: a swinging member; 231: a fixed part; 233: an opening/closing section; 235: a fixing hole; 300: a filtering part; 310: an inner filter housing; 311: a boss; 320: an outer filter housing; 321: a second filter receiving tank; 330: a filter mounting portion; 331: a first filter accommodating tank; 333: a peripheral edge portion; 335: a magnet accommodating groove; 340: a filter; 400: a sling portion (wearing portion); 410: a connecting portion; 411: a strip-shaped hook part; 420: a belt fixing part; 421: a belt accommodating groove; 423: a strap inserting hole; 424: a pocket portion; 425: a protrusion; 10: goggles.

Detailed Description

The above objects, features and advantages will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, whereby it is possible for those skilled in the art to easily embody the technical spirit of the present invention. In describing the present invention, when it is determined that the detailed description of the related known technology makes the gist of the present invention unclear, the detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the case where a certain component is "included" in a certain portion throughout the specification, if there is no particular statement to the contrary, it is not intended to exclude other components and may include other components. Note that the term "… part" or the like described in the specification means a unit that processes at least one function or operation, and this can be realized by hardware or software, or a combination of hardware and software.

Fig. 1 is an exploded perspective view illustrating a discharge valve according to an embodiment of the present invention; fig. 4 to 5 show sectional views of a discharge valve of an embodiment of the present invention.

Before describing the present embodiment, the following is explained: in daily life, a mask is worn to shield the mouth and nose of a wearer in order to prevent inhalation of dust, fine particles, chemical substances, allergic substances, and the like, which can be inhaled into the body through the mouth and/or nose, or to prevent inhalation of harmful substances such as floating dust and dust generated in various industrial fields such as factories and construction sites. Gauze mask includes the gauze mask main part usually, filter house and discharge valve, however, current discharge valve is fixed in the gauze mask main part, and current discharge valve not only discharges the gas of exhalation, also can inhale partial air through the discharge valve when breathing in, in order to reduce the inspiratory air of discharge valve, be fixed with the separation blade on the discharge valve usually, however, when the wearer exhales through the discharge valve, the separation blade hinders the effective discharge of exhalation gas, because exhalation gas humidity is great, discharge valve department is moist easily, and then easy adhesion dust, breed the bacterium, produce the peculiar smell. Therefore, a discharge valve for a mask capable of solving these problems will be described with reference to fig. 1 to 5.

The discharge valve 200 is a member for discharging exhaled gas inside the mask body 100 to the outside. The discharge valve 200 is formed as a one-way discharge valve that can be opened and closed, and when exhaling, the discharge valve 200 is opened, and the exhaled gas can be effectively discharged to the outside of the mask body 100, and when inhaling, the discharge valve 200 is closed, thereby blocking the inflow of the outside air containing harmful substances into the mask interior. At this time, the opening and closing of the discharge valve 200 depends on the movement of the swing member 230 having elasticity, which is performed according to the inhalation or exhalation of the wearer.

The structure of the discharge valve 200 will be described in more detail below.

Referring to fig. 1, the discharge valve 200 of the present embodiment includes: an inner discharge case 210, an outer discharge case 220, and a swing member 230. An internal exhaust port is provided on the internal exhaust housing 210; an external discharge port is formed in the external discharge housing 220; the inner discharge case 210 is detachably coupled to the outer discharge case 220,

one way to achieve the detachable connection of the inner discharge housing 210 and the outer discharge housing 220 may be: the external discharge casing 220 engages with the internal discharge casing 210 to form the discharge valve 200. Yet another way that may be achieved is: the external discharge case 220 and the internal discharge case 210 are provided with magnets having opposite polarities on the sides corresponding to each other, and can be coupled to each other by magnetic force. For example, the outer discharge case 220 and the inner discharge case 210 can be magnetically coupled to each other by providing a magnet in an extension portion formed by extending the outer periphery of the inner discharge case 210 by a predetermined thickness and providing a magnet opposite in polarity in an outer peripheral region of the outer discharge case 220 corresponding to the magnet in coupling. Note that, the two realizations for detachably connecting the inner discharge housing 210 and the outer discharge housing 220 include, but are not limited to, the two realizations provided above.

An inner discharge port of the inner discharge case 210 is formed opposite to and penetrating an outer discharge port of the outer discharge case 220; the swing member 230 is positioned between the inner discharge case 210 and the outer discharge case 220. The swing member 230 includes a fixing portion 231 and an opening and closing portion 233 connected to each other, and the opening and closing portion 233 is located between the inner discharge port and the outer discharge port. Wherein the swing member 230 may be connected to the inner discharge case 210, as shown in fig. 2. In this case, the fixing portion 231 may be fixedly connected to the internal discharge casing 210, for example, the fixing portion 231 may be glued to the internal discharge casing 210. Alternatively, as shown in fig. 3, the swing member 230 may be connected to the outer discharge case 220. In this case, the fixing portion 231 may be fixedly connected to the external discharge casing 220, for example, the fixing portion 231 may be glued to the external discharge casing 220.

Alternatively, as shown in fig. 1, the fixing portion 231 is fixed between the inner discharge casing 210 and the outer discharge casing 220. In this case, there may be two realizations, one of which is: the fixing portion 231 is fixed between the inner discharge case 210 and the outer discharge case 220 by an abutting surface provided on the inner discharge case 210 and the outer discharge case 220. For example, one contact surface is provided on the inner discharge housing 210, the other contact surface is provided on the outer discharge housing 220, and when the two contact surfaces are pressed against each other, the fixing portion 231 is pressed between the two contact surfaces to be fixed. Another way to achieve this is: a fixing hole is formed in the fixing portion 231, a second fixing groove is formed in one side of one of the internal discharge casing 210 and the external discharge casing 220, a second fixing protrusion is formed in the other side of the other one of the internal discharge casing and the external discharge casing, and the second fixing protrusion penetrates through the fixing hole and is clamped with the second fixing groove.

Wherein the swing member 230 may be an elastically flexible sheet.

The opening/closing part 233 is swingable between the outer discharge port direction and the inner discharge port direction, wherein the area of the opening/closing part 233 is not smaller than the area of the inner discharge port and the area of the opening/closing part 233 is not larger than the area of the outer discharge port. That is, the fixing portion 231 is fixed between the internal discharge casing 210 and the external discharge casing 220, the opening/closing portion 233 connected to the fixing portion 231 is positioned between the internal discharge port and the external discharge port, and the opening/closing portion 233 swings toward the external discharge port during exhalation, and the exhaled air is discharged through the internal discharge port; at the time of air suction, the opening/closing portion 233 swings toward the internal discharge port, and completely covers the internal discharge port. The area of the opening and closing part 233 is not smaller than the area of the inner discharge port, so that the opening and closing part 233 can completely cover the inner discharge port when inhaling, and the area of the opening and closing part 233 is not larger than the area of the outer discharge port, so that the opening and closing part 233 can swing inside and outside the outer discharge port through the outer discharge port when exhaling.

There may be two positions of the opening/closing portion 233 and the fixing portion 231, and in the first positional relationship, the fixing portion 231 is located on the side of the swing member 230, and the opening/closing portion 233 is connected to the side of the fixing portion 231. The opening/closing part 233 may be extended from the fixing part 231 toward one side to be formed at a position corresponding to the inner discharge port and the outer discharge port, and in the second positional relationship, the fixing part 231 is located at the center of the swing member, and the opening/closing part 233 is connected to the outer edge of the fixing part 231. In use, the opening/closing unit 233 swings to the outside of the mask body 100 during exhalation, and the opening/closing unit 233 swings to the inside of the mask body 100 during inhalation.

When the opening/closing portion 233 and the fixing portion 231 are in the first positional relationship, the opening/closing portion 233 may be formed at a position corresponding to the internal discharge port and the external discharge port by extending to one side from the fixing portion 231. In order to swing the opening/closing portion 233 of the swing member 230 toward the internal discharge port and to be attached to the internal discharge housing 210 so as to completely cover the internal discharge port, the internal discharge housing 210 is further provided with an internal inclined surface 212 located on one side of the internal discharge housing and located on the other side of the internal discharge housing, for example, the internal inclined surface 212 is located on the upper side of the internal discharge port, and the height of the internal inclined surface 212 on the internal discharge port side is lower than the height on the internal discharge port side; the external discharge casing 220 is further provided with an external inclined surface 222, the external inclined surface is located on one side of the external discharge casing, the external discharge port is located on the other side of the external discharge casing, for example, the external inclined surface 222 is located on the upper side of the external discharge port, and the height of the external inclined surface 222 close to the external discharge port side is lower than the height far away from the external discharge port side; the inner inclined surface 212 and the outer inclined surface 222 are inclined at the same angle; the fixing portion 231 is located between the inner inclined surface 212 and the outer inclined surface 222, and the fixing portion 231 abuts against the inner inclined surface 212 and the outer inclined surface 222, respectively. At this time, the fixing portion 231 is inclined at a predetermined angle a according to the inclination angles of the inner inclined surface 212 formed on the inner discharge case 210 and the outer inclined surface 222 formed on the outer discharge case 220 and is abutted against each other, so that an included angle is formed between the fixing portion 231 and the opening/closing portion 233, and the opening/closing portion 233 can be more preferably fallen back in the direction of the inner discharge port during air suction, and can be more preferably attached to the inner discharge case 210 to completely cover the inner discharge port. The inner inclined surface 212 is located at one side of the inner discharge case 210, and the other side is an inner discharge port, and the same outer inclined surface 222 is located at one side of the outer discharge case 220, and the other side is an outer discharge port. The operation of the discharge valve 200 will be described below with reference to fig. 4 to 5.

Fig. 4 to 5 are sectional views of a discharge valve 200 according to an embodiment of the present invention.

At this time, fig. 4 is a sectional view showing the operation of the discharge valve 200 at the time of inhalation, and fig. 5 is a sectional view showing the operation of the discharge valve 200 at the time of exhalation.

First, referring to fig. 4, since one side of the swing member 230, that is, the fixing portion 231 is formed at a predetermined angle a and inclined in the outer direction of the mask body 100 and the opening/closing portion 233 extending from the fixing portion 231 is forced toward the inner side of the mask body 100, the discharge valve 200 is finally closed to prevent the inflow of the external air containing the harmful substance and/or the allergic substance into the mask. That is, in a situation other than the case where the wearer wearing the mask breathes out the gas, when the swing member 230 does not swing as shown in fig. 4, the discharge valve 200 is always kept in the closed state. In other words, when the wearer inhales air, the opening/closing part 233 of the swing member 230 moves in the inner direction of the mask body 100 by the upward pressure to close the inner discharge port, thereby blocking the inflow of the external air containing the harmful substance and/or the allergic substance into the mask.

On the contrary, referring to fig. 5, when the mask wearer exhales (exhales), the opening/closing unit 233 of the swing member 230 swings to the outside of the mask body 100 to open the discharge valve 200, thereby discharging the gas exhaled by the wearer to the outside of the mask body 100. The fixing portion 231 may be positioned between the inner inclined surface 212 and the outer inclined surface 222 in such a manner that the fixing portion 231 is fixedly connected to the inner inclined surface 212 or the fixing portion 231 is fixedly connected to the outer inclined surface 222, or the fixing portion 231 is sandwiched between the inner inclined surface 212 and the outer inclined surface 222 and the fixing portion 231 is fixed between the inner inclined surface 212 and the outer inclined surface 222 by pressure-bonding the inner inclined surface 212 and the outer inclined surface 222.

In order to more firmly fix the swing member 230, particularly when the fixing portion 231 is fixed between two abutting surfaces of the internal discharge casing 210 and the external discharge casing 220, a fixing hole 235 is formed in the fixing portion 231, a first fixing groove 211 is formed in one of the internal inclined surface 212 and the external inclined surface 222, a first fixing protrusion 223 is formed in the other one of the internal inclined surface and the external inclined surface, the first fixing protrusion 223 is inserted into the fixing hole 235 and engaged with the first fixing groove 211, and the first fixing protrusion 223 is inserted into the fixing hole 235 and engaged with the first fixing groove 211. The swing member 230 is inserted between the first fixing groove 211 and the first fixing protrusion 223 through the fixing hole 235, and thus the swing member 230 can be prevented from falling off. Wherein, if the inner inclined surface 212 is provided with the first fixing groove 211, the outer inclined surface 222 is provided with the first fixing protrusion 223 engaged with the first fixing groove 211; if the first fixing groove 211 is formed on the outer inclined surface 222, the first fixing protrusion 223 engaged with the first fixing groove 211 is formed on the inner inclined surface 212.

In a case where the inner inclined surface 212 and the outer inclined surface 222 are not provided between the inner discharge case 210 and the outer discharge case 220, a fixing hole 235 is provided on the fixing portion 231, a second fixing groove is provided on one side of one of the inner discharge case and the outer discharge case, and a second fixing protrusion is provided on the other one of the inner discharge case and the outer discharge case, and the second fixing protrusion passes through the fixing hole to be engaged with the second fixing groove. That is, the fixing portion 231 may be fixedly connected to the internal discharge case 210 or the external discharge case 220, may be fixed between the internal discharge case and the external discharge case by pressure-bonding the inner inclined surface 212 and the outer inclined surface 222, or may be fixed between the internal discharge case and the external discharge case by engaging the second fixing groove and the second fixing protrusion.

Alternatively, the swing member 230 may be more firmly fixed by providing the inner inclined surface 212 and the outer inclined surface 222 as friction surfaces capable of increasing friction force, or by providing convex points or a wave structure on the inner inclined surface 212 and the outer inclined surface 222 to be engaged with each other so that the fixing portion 231 interposed therebetween is more firmly fixed.

For the second positional relationship between the opening/closing part 233 and the fixing part 231, the fixing part 231 may be located at the center of the swing member 230, the opening/closing part 233 is connected to the outer edge of the fixing part 231, a fixing and mounting part is provided at the center of the internal outlet, and the fixing part 231 is fixedly connected to the fixing and mounting part. The opening/closing portion 233 may be formed to extend outward around the fixing portion 231 at a position corresponding to the internal discharge port and the external discharge port and have an area not smaller than the internal discharge port and not larger than the external discharge port. The fixing and mounting part may be in the form of a mounting hole and a mounting rod, the mounting hole is provided at a position located at the center of the internal discharge port, and the fixing part 231 is fixed at the center of the internal discharge port through the mounting rod and the mounting hole. That is, the fixing portion 231 is provided at the center of the swing member 230, the fixing portion 231 is fixed at the center of the internal discharge port, the opening/closing portion 233 is wound around the outer edge of the fixing portion 231, and the opening/closing portion 233 swings with the fixing portion 231 located at the center of the swing member 230 as a fixing point.

In order to prevent the opening/closing part 233 from swinging toward the internal outlet during air suction, a first stopper 213 is provided at the internal outlet, and the internal outlet is divided into a plurality of sub-outlets by the first stopper 213. As shown in fig. 6, the side of the first limit fence 213 facing the external outlet and the side of the internal outlet facing the external outlet are on the same horizontal plane, and the first limit fence 213 can effectively block the opening/closing part 233 on the side of the internal outlet facing the external outlet, so as to avoid the incomplete closing of the outlet valve 200 caused by the swing transition of the opening/closing part 233 toward the internal outlet during air suction.

The first limit fence 213 preferably has a node at the center, and extends toward the edge of the inner discharge opening from the node at the center to form the first limit fence 213. Such a structure can effectively swing the blocking opening/closing portion 233 inward while saving the use of raw materials.

In the case where the fixing portion 231 is located at the center of the swing member 230, a fixing and mounting portion may be provided on the first stopper 213 located at the center of the internal discharge port.

In addition, the external discharge casing 220 is provided with a second stopper 221, the second stopper 221 spans both upper and lower ends of the external discharge port, and a lower side of the second stopper 221 is inclined in a direction away from the internal discharge port. The second stopper 221 may have an elongated shape at the outer side of the discharge port, thereby functioning to prevent the swing of the swing member 230 from being transited. At least one second stopper 221 is formed on the outer discharge case 220 so as to straddle the outer discharge port, thereby limiting an angle at which the swing member 230 is elastically deformed in the outer direction of the mask body 100.

In order to prevent germs from being sprayed out of the discharge valve 200 when the mask wearer speaks or breathes, a filter membrane may be provided at an internal discharge port or an external discharge port of the discharge valve 200, and the opening and closing part 233 may swing inward or outward when the filter membrane does not affect breathing.

Fig. 7 is a perspective view illustrating a mask according to an embodiment of the present invention; fig. 8 is a view showing an example of wearing a mask according to an embodiment of the present invention; fig. 9 is a perspective view of a mask body according to an embodiment of the present invention.

Referring to fig. 7 to 9, the mask of the present embodiment includes: a mask body 100, a discharge valve 200, wherein the discharge valve 200 is the discharge valve 200 provided in the above embodiment, and the discharge valve 200 is installed in the mask body 100 through a discharge valve fitting hole 101 provided in the mask body 100.

The mask body 100 is formed to cover the nose and mouth of the wearer, and when the wearer wears the mask, the mask body 100 is preferably formed of a soft material so as to be closely attached to the face to improve the sealing property. The mask body 100 may be made of synthetic resin, carbon material, rubber material, nonwoven fabric, or the like. In addition, the mask body 100 may be formed of a transparent material so that the facial expression of the wearer can be observed, and a substance having an anti-fog or anti-moisture condensation function may be coated on the inside of the mask body 100, such as: the inside of the mask body 100 is plasma-treated or the inside of the mask body 100 adopts a fine structure, for example, a micro rough surface of the inside of the mask body 100 is changed by using a nano coating or a nano film to form a smooth micro surface, thereby preventing the inside of the mask body 100 from generating moisture condensation.

As shown in fig. 9, the mask body 100 has a curved shape protruding upward so that the upper portion thereof covers the nose of the wearer, and the front end portion of the mask body 100 has a shape that is bulged in conformity with the nose shape in conformity with the contour of the wearer's face. In addition, a contact portion (not shown) may be provided at a portion where the mask body 100 contacts the skin of the wearer. The contact portion (not shown) is made of a material that can more effectively contact the mask body 100 and the skin of the wearer. For example, the contact portion (not shown) may be made of a material having high adsorbability and/or high adhesiveness, such as gel and/or silica gel. Therefore, the mask body 100 can be more effectively attached to the skin of the wearer, so that the attachment and sealing properties can be further improved, the mask body can be effectively attached to the face of the wearer, and the inflow of the outside air into the mask body 100 can be prevented.

The mask body 100 may be provided with a discharge valve attachment hole 101, a filter attachment hole 102, and a fastening portion attachment hole 103 to which parts of a mask to be described later are attached.

The mask of this embodiment further comprises: a filter 300 provided on the mask body 100, and a fastening part 400 provided on the mask body 100. The filter 300 is mounted to the mask body 100 through a filter mounting hole 102 formed in the mask body 100.

In one embodiment, the mask body 100 is protruded outwardly corresponding to the position of the nose and mouth of the wearer, the discharge valve 200 is disposed at the position of the mask body 100 protruded outwardly, and the filter 300 is disposed at a position away from the discharge valve 200. That is, the discharge valve 200 is disposed at a position where the mask body 100 protrudes outward, and the filter 300 is disposed at a position where the non-mask body 100 protrudes outward, for example, the filter 300 is disposed at both sides of the mask body 100. The mask body 100 is protruded outward corresponding to the nose and mouth of the wearer, so that the exhaled air of the wearer can be concentrated at the protruded position, and the filter unit 300 is disposed at a position far away from the exhaust valve 200, so that a large amount of air can be prevented from being sprayed to the filter unit 300 during exhalation, and the filter unit 300 is easily damaged due to high humidity of the exhaled air, particularly, the filter disposed in the filter unit 300 is easily damaged.

In another embodiment, the mask body 100 is provided at the lower side thereof with an inner fastening structure which is matched with the shape of the chin of the wearer, the discharge valve 200 is provided at the inner fastening structure of the mask body 100, and the filter 300 is provided at the side of the mask body 100. When the wearer exhales through the nose, the air is exhaled downward through the nostrils, that is, the exhaled air flows toward the bottom of the mask body 100, so that the discharge valve 200 is disposed at the inner fastening structure at the lower side of the mask body 100, thereby smoothly discharging the air exhaled through the nose. The filter 300 is disposed on the side of the mask body 100, so that a large amount of gas is prevented from being blown to the filter 300 during exhalation, and the filter 300 is easily damaged due to the high humidity of the exhaled gas, particularly, the filter disposed on the filter 300 is easily damaged.

In another embodiment, the filter 300 is disposed on the mask body 100 near the nose and mouth of the wearer. The effect of filter 300 is that the clean air after will filtering supplies to mouth and nose and inhales, when breathing in, the inside negative pressure that can form of gauze mask main part 100, and gauze mask main part 100 will laminate in wearer's face, at this moment, if do not set up filter 300 in gauze mask main part 100 is close to wearer's mouth nose position, so, the laminating of gauze mask main part 100 and wearer's face, the air current after probably can hindering to handle through filter 300 to wearer's mouth nose position, also can cause wearer's breathing difficulty. Therefore, by disposing the filter 300 in the mask body 100 near the nose and mouth of the wearer, the above-mentioned situation can be avoided. In this embodiment, the mask body 100 may be disposed to protrude outward corresponding to the nose and mouth of the wearer, an inner fastening structure is disposed on the lower side of the mask body 100, the inner fastening structure is engaged with the chin of the wearer, and the discharge valve 200 is disposed at the inner fastening structure of the mask body 100, so that a certain space is formed between the protruding portion and the face, and the amount of air flow inside the mask body 100 can be further increased.

In the embodiments, although the discharge valve 200 and the filter 300 are described in the mask body 100, the present invention is not limited thereto, and the number of the discharge valve 200 and the filter 300 may be set as needed.

In order to facilitate replacement or cleaning of the components of the discharge valve 200, the inner discharge case 210 of the discharge valve 200 is located inside the mask body 100, the outer discharge case 220 of the discharge valve 200 is located outside the mask body 110, and the inner discharge case 210 and the outer discharge case 220 are fastened to the assembly holes of the discharge valve 220. That is, the internal discharge case 210 is inserted from the inside of the mask body 100 shown in fig. 9 and fixed to one side of the mask body 100. The outer circumference of the internal discharge case 210 further includes an extension portion formed to extend with a predetermined thickness, so that the internal discharge case 210 can be prevented from being separated to the outside of the mask body 100 when inserted from the mask body 100, and the replacement or cleaning of the discharge valve 200 components can be facilitated.

In order to prevent the internal discharge case 210 from falling off, an adhesive may be applied to an extension portion that contacts the mask body 100 to fix the internal discharge case 210 to the mask body 100.

In addition, as shown in fig. 10, the mask of the present embodiment may be connected to goggles 10. More specifically, magnets are provided on the outer side of the upper portion of the mask body 100 having a curved shape that bulges upward to shield the nose of the mask wearer, and magnets are provided in the central region between the lenses of the goggles 10 corresponding to the side of the mask body 100 on which the magnets are provided, whereby the goggles 10 and the mask body 100 are magnetically coupled. Therefore, the goggles 10 can be easily attached to and detached from the mask. At this time, the goggles 10 protect the eyes of the mask wearer and prevent foreign objects from entering the wearer's eyes.

The filter 300 is a member for filtering air outside the mask containing harmful substances and/or allergic substances and allowing the filtered air to flow into the mask. The filter 300 is formed to be separable from the mask body 100 so that the filter 300 can be easily replaced, thereby filtering air flowing from the outside and allowing the filtered air to flow into the mask body 100.

The filter 300 is fitted into the filter fitting hole 102 of the mask body 100 shown in fig. 9. Hereinafter, the filter unit 300 will be described in detail with reference to fig. 11 to 13.

Referring to fig. 11, the filter part 300 of the present embodiment includes: inner filter housing 310, outer filter housing 320, filter mounting portion 330, and filter 340.

The internal filter housing 310 is inserted from the inside of the mask body 100 shown in fig. 8 and fixed to one side of the mask body 100. The outer circumference of the inner filter housing 310 further includes an extension portion extending with a predetermined thickness, so that the inner filter housing 310 is prevented from being separated from the mask body 100 when inserted from the inside of the mask body 100.

Further, an adhesive may be applied to the extension portion contacting the mask body 100 to fix the inner filter housing 310 to the mask body 100.

The filter mounting part 330 is located between the inner filter case 310 and the outer filter case 320, and the inner filter case 310 and the filter mounting part 330 are detachably connected.

The filter 340 is positioned between the filter mounting portion 330 and the outer filter housing 320.

The external filter case 320 is located outside the mask body 100, detachably connected to the filter mounting portion 330, and an inflow port through which external air flows is provided in the external filter case 320.

The filter mounting portion 330 is provided with a first through hole, and the inner filter housing 310 is provided with a second through hole penetrating the first through hole; the filter 340 is located on an air flow path between the first through-hole and the inflow port, so that the air flowing in from the inflow port flows into the first through-hole via the filter 340.

The components of the filter 300 are detachably connected to each other, so that the filter is convenient to install, clean and replace.

One way of achieving the detachable connection between the inner filter housing 310 and the filter mounting portion 330 may be: the inner filter case 310 is engaged with the filter mounting portion 330.

Yet another way that may be achieved is: the inner filter housing 310 and the filter mounting portion 330 may be magnetically coupled by a magnet. The inner filter housing 310 and the filter mounting portion 330 are coupled to each other by magnets having opposite polarities on the sides corresponding to each other. For example, the inner filter housing 310 and the filter mounting portion 330 can be magnetically coupled to each other by providing a magnet at an extension portion formed by extending the outer periphery of the inner filter housing 310 to a predetermined thickness and providing a magnet at an outer peripheral region of the filter mounting portion 330 corresponding to the magnet at the coupling. For example, the inner filter housing 310 and the filter mounting portion 330 can be magnetically coupled to each other by providing a magnet at an extension portion formed by extending the outer periphery of the inner filter housing 310 to a predetermined thickness and providing a magnet at an outer peripheral region of the filter mounting portion 330 corresponding to the magnet at the coupling. Note that, the two realizations of the detachable connection of the inner filter housing 310 and the filter mounting portion 330 include, but are not limited to, the two realizations provided above.

The filter mounting portion 330 is coupled to be interposed between the inner filter case 310 and the outer filter case 320, and is used to mount the filter 340, the filter 340 is used to filter the external air and to allow the external air to flow into the mask body 100, and the filter 340 is located in the air flow path between the first through-hole and the inlet port such that the air flowing in from the inlet port flows into the first through-hole through the filter 340.

The filter mounting portion 330 and the outer filter case 320 may be connected in the following manner: the filter mounting portion 330 is engaged with the outer filter case 320.

Alternatively, the filter attachment portion 330 and the outer filter housing 320 are magnetically coupled to each other by providing magnets having opposite polarities on the corresponding sides. For example, magnets having opposite polarities are provided on the peripheral edge region of the filter attachment portion 330, and magnets are provided on the peripheral edge region of the outer filter case 320 corresponding thereto when the filter attachment portion 330 and the outer filter case 320 are coupled to each other by magnetism. Note that, the two realizable manners of detachably connecting the filter mounting portion 330 and the outer filter housing 320 include, but are not limited to, the two realizable manners provided above.

The filter mounting part 330 is detachably coupled to the inner filter case 310 so that the filter mounting part 330, the filter 340 and the outer filter case 320 can be easily separated from or coupled to the inner filter case 310, and the filter mounting part 330 and the outer filter case 320 are detachably coupled so that the filter 340 between the filter mounting part 330 and the outer filter case 320 can be easily replaced.

The outer filter case 320 is coupled to the outside of the inner filter case 310. The outer filter case 320 is positioned outside the mask body 100 to protect the filter 340 to which the filter mounting portion 330 is mounted. The outer filter housing 320 may be formed of a transparent material. For example, the material of the external filter housing 320 may be Acrylonitrile Butadiene Styrene (ABS) resin. In this way, since the outer filter case 320 is formed of a transparent material, it is possible to easily confirm whether the filter 340 is defective and/or contaminated with the naked eye, and thus the filter 340 can be quickly replaced when defective and/or contaminated.

The filter 340 is preferably a hollow cylindrical filter, and particularly preferably has a pleated cylindrical shape with a hollow interior. In other words, the filter 340 has a shape bent in zigzag pleats along the circumferential direction. In this way, since a large area can be formed when the filter 340 has a pleated cylindrical shape, the filter 340 having a large area can filter the outside air before the outside air flows into the inside, thereby improving the filtering effect. The filter 340 of the present embodiment has a form in which pleats are bent in the circumferential direction, as compared with a conventional filter formed to be flat in the circumferential direction, and therefore, the surface area is increased. In this case, the increase in the surface area means an increase in the filtration area, and when the filter 340 of the present embodiment is used, the filtration capacity can be improved as compared with the conventional filter.

The filter 340 of the present embodiment may be a high efficiency particulate air filter, a filter with a drug substance capable of preventing or treating diseases, or a filter capable of suppressing an allergic substance such as pollen. A high efficiency particulate air filter is an air cleaning device for filtering particulate in air. A high efficiency particulate air filter is a filter that filters fine particles with high efficiency when a highly clean environment is manufactured in facilities for handling radioactive materials, clean rooms, and the like. In addition, hepa filters are used in chemical laboratories and in places where there is a general need for clean air for human health and safety.

When the filter 340 is a hollow cylindrical filter, one end of the filter 340 above is in contact with the inner wall of the outer filter case 320, and the other end of the filter 340 below is in contact with the inner wall of the filter mounting portion 330 facing the outer filter case 320; the inlet port of the outer filter case 320 is positioned above the hollow portion of the filter 340, and the first through hole of the filter mounting portion 330 is positioned between the outer edge of the filter mounting portion 330 and the outer edge of the filter. Both ends of the filter 340 are in contact with a space between the filter mounting portion 330 and the external filter case 320, and external air enters the hollow portion of the filter 340 through the inlet port of the external filter case 320, and the air filtered by the filter 340 further flows to the first through-hole between the outer edge of the filter mounting portion 330 and the outer edge of the filter. As a result, the filtered air passes through the first through hole of the filter attachment portion 330 to the second through hole of the internal filter housing 310, and finally enters the inlet cover body 100. The first through-holes of the filter mounting part 330 may be formed at both sides of the filter mounting part 330.

Referring to fig. 11, the air inflow port is provided on the top surface of the external filter case 320, i.e., above the hollow portion of the filter mounting part 330, and the first through-holes are provided at both sides of the filter mounting part 330. In another embodiment, the air inlet may be provided on a side surface of the outer filter case 320, and the corresponding first through hole may be provided at a middle position of the filter mounting portion 330 to correspond to the hollow portion of the filter 340, and in this case, the air flowing in from the air inlet may flow into the first through hole after entering the hollow portion through the filter 340.

To prevent the installed filter 340 from moving between the filter mounting portion 330 and the outer filter housing 320, the position is changed, resulting in a portion of unfiltered air entering the interior of the inlet hood. A support post protruding toward the external filter case 320 is provided on the filter mounting portion 330 on a side toward the external filter case 320, and the filter hollow portion is inserted through the support post. Filter 340 cup joints on the support column through well kenozooecium, and the support column has played the effect of supporting filter 340, simultaneously, plays and carries out spacing effect to filter 340, prevents that filter 340 drunkenness, and the position changes.

In order to make the coupling of the inner filter housing 310 and the filter mounting part 330 more firm. The inner filter casing 310 is provided with a boss 311 protruding in the direction of the filter mounting portion 330, the boss 311 is provided with a first magnet M, the filter mounting portion 330 is provided with a magnet receiving groove 335 engaged with the boss 311, the magnet receiving groove 335 is provided with a second magnet M having a polarity opposite to that of the first magnet M, and a first filter receiving groove 331 for mounting the filter is formed between the outer edge of the filter mounting portion 330 and the outer edge of the bottom surface of the magnet receiving groove 335. The boss 311 may be formed at a predetermined height from the bottom surface at the center of the inner filter case 310 and may receive the first magnet M therein, and at this time, the first magnet M provided in the boss 311 of the inner filter case 310 and the second magnet M provided in the magnet receiving groove 335 of the filter mounting portion 330 are magnetically attracted to each other with opposite polarities and coupled. In the coupling of the inner filter case 310 and the filter mounting portion 330, the protruding portion of the boss 311 is magnetically coupled by the magnet while being caught inside the magnet receiving groove 335 as shown in fig. 11, whereby the coupling of the inner filter case 310 and the filter mounting portion 330 is more secured. Further, since the coupling and the disassembly are easy, the filter 340 mounted on the filter mounting portion 330 can be replaced more easily.

During production, a gap of about 0.1mm is typically left between the installed filter mounting portion 330 and the inner filter housing 310 due to injection molding, which may result in poor sealing between the filter mounting portion 330 and the inner filter housing 310. To avoid this problem, a gasket may be disposed between the filter mounting portion 330 and the inner filter housing 310, and the gasket may be made of a soft material, such as: and sealing the rubber ring.

The filter attachment portion 330 has a first filter receiving groove 331 formed between the magnet receiving groove 335 of the filter attachment portion 330 and the peripheral edge 333 of the bottom portion for receiving the filter 340. At this time, the first filter receiving groove 331 is formed between the magnet receiving groove 335 of the filter mounting portion 330 and the peripheral edge 333 of the bottom portion to have a step of a predetermined depth, thereby efficiently mounting the filter 340. In other words, since the first filter accommodation groove 331 is formed to have a step of a predetermined depth, the filter 340 can be prevented from being detached when the filter 340 is attached to the filter attachment portion 330. If the filter accommodating groove 331 is not provided, the filter 340 moves in the outward direction and comes to rest on the outlet side. In this case, the outside air containing the harmful substance and/or the allergic substance flowing in from the inlet of the external filter case 320 directly flows into the mask body 100 from the outlet without being filtered by the filter 340. However, according to the present embodiment, since the filter 340 is mounted in the first filter housing groove 331 having a step of a predetermined depth, the filter 340 can be prevented from moving, and the purpose of fixing the filter 340 can be achieved.

In order to prevent the filter 340 from moving and thus achieve the fixing of the filter 340, another embodiment is provided below in which a second filter receiving groove 321 is formed around the inflow port on the inner wall of the outer filter housing 320. One end of the filter 340 is fixed in the second filter receiving groove 321, so that the filter 340 can be prevented from moving, thereby achieving the fixing purpose of the filter 340.

It is understood that the first filter receiving groove 331 and the second filter receiving groove 321 may be formed at the same time, that is, one end of the filter 340 is fixed in the first filter receiving groove 331 and the other end is fixed in the second filter receiving groove 321, so that the filter 340 can be better fixed.

During exhalation, there is a possibility that the exhaled gas containing moisture may enter the filter part 300, so that the moisture may wet the filter 340, and the using effect and the service life of the filter 340 may be affected. In order to avoid the above problem, a valve sheet may be disposed on the inner filter housing 310 toward the inner side of the mask body 100, and the valve sheet may be disposed at the second through hole. When breathing in, the valve block swings towards the direction that the mask is close to the human face, and the second through hole is kept away from, so that outside air enters the inside of the mask. When the filter is used for exhalation, the valve sheet swings towards the direction close to the inner filter shell 310, so that the valve sheet is tightly attached to the inner filter shell 310 and completely covers the second through hole, the exhaled gas cannot enter the filter part 300, and the use effect and the service life of the filter 340 are further prevented from being influenced by moisture. The connection between the valve plate and the inner filter housing 310 can refer to the connection between the swing member 230 and the inner discharge housing 210 and the outer discharge housing 220 in the embodiment, and will not be described herein.

To summarize the filter unit 300, as shown in fig. 13, the outside air containing the harmful substance and/or the allergenic substance flows in from the inlet port formed in the external filter casing 320 and is filtered through the filter 340. Then, the air filtered by the filter 340 enters the mask body 100 through the outlet port (the first through-hole and the second through-hole) formed in the filter attachment portion 330 and the inner filter case 310. Therefore, when the mask wearer inhales (inhales) air, clean air filtered by the filter unit 300 can be inhaled. In a preferred embodiment, the external filter case 320 has an inlet port through the center thereof for allowing external air to flow in, the filter mounting portion 330 has a first filter receiving groove 331 for receiving the filter 340 formed therein, and outlet ports (first through-holes) through both sides of the filter receiving groove 331 for allowing air filtered by the filter 340 to flow in the mask body 100. Further, an outlet port (second through-port) corresponding to the outlet port of the filter attachment portion 330 is formed through the internal filter housing 310 so that the air filtered by the filter 340 flows into the mask body 100. At this time, the filter 340 is accommodated in the first filter accommodating groove 331, a hollow portion formed inside corresponds to the inlet port of the external filter case 320, and the pleated wall surface is positioned between the inlet port of the external filter case 320 and the outlet port of the filter mounting portion 330 and the internal filter case 310, so that the external air flowing in from the inlet port passes through the hollow portion, is filtered through the pleated wall surface, and flows out to the mask body 100, and the mask wearer can inhale clean air filtered by the filter unit 300 when inhaling air.

The filter mounting part 330 is detachably coupled to the inner filter housing 310, that is, when the filter 340 needs to be replaced, the filter mounting part 330, the filter 340 and the outer filter housing 320 are easily separated from the mask body 100, and the filter mounting part 330 and the outer filter housing 320 are detachably coupled to each other, thereby facilitating replacement of the filter 340 between the filter mounting part 330 and the outer filter housing 320.

The fastening portion 400 is provided to fix the mask to the face of the wearer when the wearer wears the mask. The fastening portion 400 may be implemented in various ways to fix the mask to the wearer's face, for example, the fastening portion 400 may be provided at the end of one side of the mask body 100 that is a position corresponding to the ear when the mask is worn by the wearer.

In current gauze mask, usually the belt is direct to be connected with the gauze mask main part to the belt is connected with the gauze mask main part with the point formula of connecing, makes the person of wearing when speaking, because opening and shutting of mouth, the gauze mask main part can use the point formula of connecing junction to rotate downwards as the axis of rotation, makes the whole landing downwards of gauze mask, and then leads to gauze mask upper portion to break away from the nasal cavity position, influences the result of use.

In order to solve the person of wearing when speaking, because the opening and shutting of mouth, the gauze mask main part can use point to connect formula junction to rotate down as the axis of rotation, makes the whole landing downwards of gauze mask, and then leads to gauze mask upper portion to break away from the nasal cavity position, influences the technical problem of result of use, this application still provides a suspender portion 400 of gauze mask.

As shown in fig. 14, the strap part 400 of the mask provided by the present application includes two strap fastening parts 420 and a strap; the two band fixing parts 420 are connected by the connecting part 410; the connecting part 410 is connected with the mask body 100; the band comprises two attachment ends, one of the attachment ends of the band being attached to one of the band securing portions 420 and the other attachment end of the band being attached to the other band securing portion 420; as shown in fig. 10, a distance L1 between the two connecting ends of the strap is greater than or equal to a diameter L2 of the ear of the wearer, wherein the diameter L2 of the ear is the distance between the strap at the upper end of the ear and the strap at the lower end of the ear when the mask is worn.

In the mask provided by the present application, the strap is not directly connected to the mask body 100, but is connected to the mask body 100 by a single strap 400. That is, the strap is connected to the two strap fixing parts 420 coupled to the hanging strap part 400 of the mask body 100, and a distance between the two strap fixing parts 420 is set such that a distance L1 between both connection ends of the strap after the strap is connected to the two strap fixing parts 420 is greater than or equal to a diameter L2 of the wearer's ear, wherein when a distance L1 between both connection ends of the strap is equal to a diameter L2 of the wearer's ear, it corresponds to a state in which the strap at the upper end is parallel to the strap at the lower end. When the distance L1 between two link of belt is more than or equal to the diameter L2 of wearer's ear, the pulling force between belt and the gauze mask main part shares simultaneously through two link of the belt that have certain interval for the atress is more even, even when the wearer is speaking, along with opening and shutting of mouth, the gauze mask main part can also not rotate downwards and make the whole landing of gauze mask downwards.

As shown in fig. 10, the point a of the uppermost end of the mask body 100 is at the same level as the point B of the strap connecting end at the upper end and the point C of the strap contacting the upper end of the ear.

The applicant found that when A, B, C points are at the same level, the mask has the best stability when worn, and when speaking, the upper end of the mask body 100 does not slip off and the overall appearance of the mask is not affected.

As shown in fig. 14, the band fixing part 420 is provided with a band insertion hole 423, and the connection end of the band passes through the band insertion hole 423 and forms a knot preventing the band from being separated.

The band may be in the form of a band having elasticity such as a rubber band to be worn on the ear of the wearer. The connection of the band to the band fixing parts 420 may be variously changed, for example, the both connection ends of the band are directly glued to the both band fixing parts 420, or knots are formed at both ends of the band passing through the band insertion holes 423, respectively. In this embodiment, after the knot is formed at one connection end of the strap passing through one strap insertion hole 423, the knot is formed at the other connection end of the strap passing through the other strap insertion hole 423 while adjusting the length of the strap, so that the worn mask is fixed on the wearer's face. The advantage of this connection is that the wearer can adjust the tightness of the belt according to his or her condition, and the belt can be easily replaced.

At this time, the knotted portion of the string in this embodiment protrudes, and when the wearer wears the mask, the skin of the face may directly contact the knotted portion, which causes discomfort.

In the first embodiment, referring to fig. 14, a band holding groove 421 recessed toward the outside of the band fixing part 420 is formed inside the band fixing part 420, and the knot is positioned in the band holding groove 421.

The inner side of the strap fastening part 420 refers to a side facing the inner side of the mask body 100, and the outer side of the strap fastening part 420 refers to a side facing the outer side of the mask body 100. When a wearer wears the mask, a cavity is formed between the belt holding groove 421 inside the belt fixing part 420 and the face, the knot of the belt is held in the belt holding groove 421, and the knot does not contact with the skin of the wearer, so that the wearer can be prevented from having a sense of discomfort caused by the knot of the belt when wearing the mask. Meanwhile, the knot is received in the strap receiving groove 421, so that the assembly of the fastening part 400 and the mask body 100 is not affected.

In a second embodiment, referring to fig. 15, a pocket 424 is formed inside the belt fastening part 420, the pocket 424 is positioned opposite to the belt insertion hole 423, and the buckle is positioned in the pocket 424.

In this embodiment, the pocket 424 and the end of the band fixing part 40 having the band insertion hole 423 are formed as a semi-enclosed cavity structure, one end of the cavity structure is opened, the band insertion hole 423 is formed on the inner side of the band fixing part 420 at a lower position of the cavity structure, and when the wearer wears the mask, the buckle of the band is received in the pocket 424 and the buckle does not contact with the skin of the wearer, thereby preventing the wearer from feeling uncomfortable due to the buckle of the band.

It is understood that, in order to better solve the problem, the first embodiment may be combined with the second embodiment, that is, the tape fixing part 420 is provided at the inner side thereof with the tape receiving groove 421 recessed to the outer side of the tape fixing part 420, and the tape fixing part 420 is provided at the inner side thereof with the pocket 424, the pocket 424 being located opposite to the tape insertion hole 423. The description may specifically refer to the above embodiments, and is not repeated.

As for the connection manner of the connection portion 410 and the mask body 100, there may be a plurality of connection manners, and referring to fig. 14, a strip hook portion 411 connected with the mask body 100 is provided on the connection portion 410, a fastening hole 103 for fastening the fastening portion is provided on the mask body 100, and the strip hook portion 411 is fastened and connected with the fastening hole 103 for fastening the fastening portion.

The strip hook 411 is engaged with the strap fitting hole 103, the connection between the strap 400 and the mask body 100 is a strip structure, rather than a point structure, and the connection is a strip structure to prevent the mask body 100 from rotating around the connection.

In another connection manner, referring to fig. 15 and 16, a plurality of protrusions 425 connected to the mask body 100 are formed on the connection portion 410, mounting holes matched with the protrusions 425 are formed in the mask body 100, the protrusions 425 are engaged with the mounting holes, and the plurality of protrusions 425 are dispersedly disposed on the connection portion 410.

The plurality of protrusions 425 are dispersedly disposed on the connection portion 410, and it can be understood that the plurality of protrusions 425 are not in a concentrated state on the connection portion 410, that is, after the plurality of protrusions 425 are engaged with the corresponding mounting holes, the fastening portion 400 is not in a point-type connection with the mask body 100, and the mask body 100 does not rotate about the engagement portion of the protrusions 425 with the corresponding mounting holes.

In the above-described connection method of the connecting portion 410 and the mask body 100, the fastening portion 400 is engaged with the mask body 100 by the hook strip 411 or the protrusion 425, but the present invention is not limited thereto, and for example, the connecting portion 410 and the mask body 100 may be magnetically connected by a magnet, and in one embodiment, two fastening portions 400 may be connected to the mask body 100 in two different ways, for example, one fastening portion 400 is engaged with the mask body 100, and the other fastening portion 400 is magnetically connected to the mask body 100. In this case, a magnet is provided on the side of the connection portion 410 contacting the mask body 100, and a magnet may be provided on the mask body 100 at a position corresponding to the magnet provided on the connection portion 410, so that the strap portion 400 and the mask body 100 are magnetically coupled. The reason why the fastening portion 400 is magnetically coupled to the mask body 100 is as follows: when the strap connected to the strap part 400 is in a strap shape that cannot be hooked on the ear, inconvenience in wearing the mask by the mask wearer is minimized. That is, in the case where the strap is in a strip shape and one of the two fastening portions 400 is magnetically coupled to the mask body 100 as described above, first, the mask wearer closely contacts the mask body 100 to the face, and then the strap connected to the fastening portion 400 engaged with the fastening portion fitting hole 103 by the hook portion 411 is passed from the rear end of the head, and then the fastening portion 400 provided with the magnet is coupled to the mask body 100 side provided with the magnet, so that the mask wearer can more easily wear the mask.

In order to more stably connect the strap part 400 to the mask body 100, the lower end of the strap fixing part 420 is connected to the mask body 100.

The lower end of the strap fastening part 420 refers to the end of the strap fastening part 420 not connected to the strap connection end, and the strap part 400 is connected to the mask body 100 only through the middle connection part 410, so that the strap fastening parts 420 at the two ends of the connection part 410 are easily tilted outwards under the pulling force of the strap when the mask is worn, thereby affecting the stability of the connection between the connection part 410 and the mask body 100. In order to solve the above problems, the lower end of the strap fastening part 420 is connected to the mask body 100, so that the strap fastening part 420 is fixedly connected to the mask body 100, thereby preventing the above problems.

Further, in the mask fastening part 400 of the present invention, C-shaped notches are formed above and below the connecting part 410, respectively.

When the mask is worn, under the action of the tensile force of the straps, the gaps can enable the inner sides of the two strap fixing parts 420 to be better attached to the mask body 100.

Further, the two band fixing parts 420 are integrally formed with the connecting part 410. The strap part 400 is integrally formed with the mask body 100.

The connection between the two strap fastening portions 420 and the connecting portion 410 and the connection between the strap portion 400 and the mask body 100 are not limited to the above connection.

The inclusion of many features in this description does not imply that these features should be considered in a limiting sense on the scope of the invention or the scope of the claims. Furthermore, features illustrated in separate embodiments of the specification can be combined in a single embodiment. Conversely, various features that are described in the context of a single embodiment of the specification can be implemented in various embodiments separately or in any suitable combination.

The present invention is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes can be made by those skilled in the art to which the present invention pertains without departing from the technical spirit of the present invention.

Claims (42)

1. A discharge valve for a mask, comprising:

an inner discharge casing, an outer discharge casing, and a swing member;

an internal discharge port is arranged on the internal discharge shell;

the external discharge shell is provided with an external discharge port;

the internal discharge shell and the external discharge shell are detachably connected, and the internal discharge port is communicated with the external discharge port;

the swing member is located inside discharge housing with between the outside discharge housing, the swing member includes fixed part and switching part that connects each other, the switching part is located inside discharge port with between the outside discharge port, the fixed part with inside discharge housing or outside discharge housing fixed connection, or, the fixed part is fixed in inside discharge housing with between the outside discharge housing, the switching part can outside discharge port direction with swing between the inside discharge port direction, wherein, the area of switching part is not less than the area of inside discharge port just the area of switching part is not more than the area of outside discharge port.

2. The discharge valve for mask according to claim 1, wherein,

the fixing part is positioned on one side of the swinging part, and the opening and closing part is connected with one side of the fixing part.

3. The discharge valve for a mask according to claim 2,

the internal discharge shell is also provided with an internal inclined plane, the internal inclined plane is positioned on one side of the internal discharge shell, the internal discharge port is positioned on the other side of the internal discharge shell, and the height of the internal inclined plane close to the internal discharge port side is lower than the height far away from the internal discharge port side;

the external discharge shell is also provided with an external inclined surface, the external inclined surface is positioned on one side of the external discharge shell, the external discharge port is positioned on the other side of the external discharge shell, and the height of the external inclined surface close to the external discharge port side is lower than the height far away from the external discharge port side;

the inclined angle of inside inclined plane with the inclined angle of outside is the same, the fixed part is located between inside inclined plane and the inclined plane of outside, the fixed part with inside inclined plane or the inclined plane fixed connection of outside, or, the fixed part respectively with inside inclined plane with the inclined plane of outside butt.

4. The discharge valve for mask according to claim 3, wherein,

the fixing part is provided with a fixing hole, one of the inner inclined surface and the outer inclined surface is provided with a first fixing groove, the other one of the inner inclined surface and the outer inclined surface is provided with a first fixing protrusion, and the first fixing protrusion penetrates through the fixing hole and is clamped with the first fixing groove.

5. The discharge valve for a mask according to claim 2,

the fixed part is provided with a fixed hole, one side of one of the internal discharge shell and the external discharge shell is provided with a second fixed groove, the other side of the internal discharge shell and the external discharge shell is provided with a second fixed protrusion, and the second fixed protrusion penetrates through the fixed hole and is clamped with the second fixed groove.

6. The discharge valve for mask according to claim 1, wherein,

the fixed part is positioned in the center of the swinging part, and the opening and closing part is connected with the outer edge of the fixed part;

the inside discharge port center is equipped with fixed mounting portion, the fixed part with fixed mounting portion fixed connection.

7. The discharge valve for mask according to claim 1, wherein,

the internal exhaust port is provided with a first limiting fence, and the internal exhaust port is divided into a plurality of sub exhaust ports by the first limiting fence.

8. The discharge valve for mask according to claim 1, wherein,

and a second limiting fence is arranged on the external discharge shell, the second limiting fence spans the upper end and the lower end of the external discharge port, and the lower side of the second limiting fence is inclined in the direction away from the internal discharge port.

9. A mask, comprising:

a mask body provided with a filter mounting hole; and

the filter unit according to any one of claims 1 to 6, which is attached to the mask body through the filter unit attachment hole.

10. The mask of claim 9 wherein,

the inside discharge casing of bleeder valve is located the gauze mask main part is inboard, the outside discharge casing of bleeder valve is located the gauze mask main part outside, inside discharge casing with outside discharge casing joint in on the bleeder valve pilot hole.

11. The mask of claim 9 wherein,

the mask further comprises a filtering part arranged on the mask body and a lacing part arranged on the mask body.

12. The mask of claim 9 wherein,

the mask main body is arranged corresponding to the position of the mouth and the nose of a wearer in an outward protruding mode, the discharge valve is arranged at the position of the mask main body in the outward protruding mode, and the filtering portion is arranged far away from the position of the discharge valve.

13. The mask of claim 9 wherein,

the utility model discloses a gauze mask, including gauze mask main part, discharge valve, filter portion, gauze mask main part downside is equipped with interior knot structure, interior knot structure and the cooperation of the person's of wearing chin position, discharge valve set up in gauze mask main part interior knot structure department, the filter portion set up in the gauze mask main part is the side.

14. The mask of claim 9 or 13 wherein,

the filtering part is arranged at the position of the mask main body close to the mouth and the nose of a wearer.

15. The mask of claim 11 wherein,

the filter part includes: an inner filter housing, an outer filter housing, a filter mounting portion, and a filter;

the filter mounting part is positioned between the inner filter shell and the outer filter shell, and the inner filter shell and the filter mounting part are detachably connected;

the external filter shell is detachably connected with the filter mounting part, and an inflow port for allowing external air to flow in is arranged on the external filter shell;

the filter mounting part is provided with a first through hole, and the inner filter shell is provided with a second through hole communicated with the first through hole;

the filter is located on an air flow passage between the first through-hole and the inflow port, so that air flowing in from the inflow port flows into the first through-hole via the filter.

16. The mask of claim 15 wherein,

the filter is a cylindrical filter with a hollow part, one end of the filter is abutted with the inner wall of the outer filter shell, and the other end of the filter is abutted with the inner wall of the filter mounting part facing to one side of the outer filter shell; the inlet port of the outer filter case is located above the hollow portion, and the first through-hole is located between the outer edge of the filter mounting portion and the outer edge of the filter.

17. The mask of claim 15 wherein,

the internal filtering shell and the filter mounting part are magnetically connected through a magnet.

18. The mask of claim 17 wherein,

the filter comprises an internal filtering shell, and is characterized in that a boss protruding towards the direction of a filter mounting part is arranged on the internal filtering shell, a first magnet is arranged on the boss, a magnet accommodating groove clamped with the boss is arranged on the filter mounting part, a second magnet with the polarity opposite to that of the first magnet is arranged in the magnet accommodating groove, and a first filter accommodating groove for mounting the filter is formed between the outer edge of the filter mounting part and the outer edge of the bottom surface of the magnet accommodating groove.

19. A strap portion of a mask, comprising:

two strap securing portions and a strap;

the two belt fixing parts are connected through a connecting part;

the connecting part is connected with the mask main body;

the belt comprises two connecting ends, one of the connecting ends of the belt is connected with one of the belt fixing parts, and the other connecting end of the belt is connected with the other belt fixing part;

the distance between the two connecting ends of the band is larger than or equal to the diameter of the ear of the wearer, wherein the diameter of the ear is the distance between the band positioned at the upper end of the ear and the band positioned at the lower end of the ear when the sling part is worn.

20. The mask band according to claim 19, wherein the mask band is formed of a band-like material,

the uppermost end of the mask body is in contact with the belt connecting end at the upper end and the upper end of the ear at the same horizontal height.

21. The mask band according to claim 19, wherein the mask band is formed of a band-like material,

the belt fixing part is provided with a belt inserting hole, and the connecting end of the belt penetrates through the belt inserting hole and forms a knot for preventing the belt from falling off.

22. The mask band according to claim 21, wherein the mask band is formed of a band-like material,

the inner side of the belt fixing part is provided with a belt accommodating groove which is sunken towards the outer side of the belt fixing part, and the knot is positioned in the belt accommodating groove.

23. The mask band according to claim 21, wherein the mask band is formed of a band-like material,

the belt fixing part is characterized in that a pocket part is arranged on the inner side of the belt fixing part, the pocket part is located opposite to the belt inserting hole, and the knot is located in the pocket part.

24. The mask band according to claim 19, wherein the mask band is formed of a band-like material,

the mask is characterized in that the connecting part is provided with a strip-shaped hook part connected with the mask body, the mask body is provided with a hanging strip part assembling hole, and the strip-shaped hook part is connected with the hanging strip part assembling hole in a clamping manner.

25. The mask band according to claim 19, wherein the mask band is formed of a band-like material,

the mask is characterized in that the connecting portion is provided with a plurality of protrusions connected with the mask body, the mask body is provided with mounting holes matched with the protrusions, the protrusions are connected with the mounting holes in a clamping mode, and the protrusions are dispersedly arranged on the connecting portion.

26. A strap portion of a mask according to claim 24 or 25, wherein the strap portion is a hook portion,

the lower end of the belt fixing part is connected with the mask main body.

27. The mask band according to claim 19, wherein the mask band is formed of a band-like material,

c-shaped notches are formed above and below the connecting part respectively.

28. The mask band according to claim 19, wherein the mask band is formed of a band-like material,

the two belt fixing parts and the connecting part are integrally formed.

29. The mask band according to claim 19, wherein the mask band is formed of a band-like material,

the strap part and the mask body are integrally formed.

30. A discharge valve for a mask, comprising:

an internal discharge casing having an internal discharge port;

an external discharge casing having an external discharge port opposed to the internal discharge port and detachably connectable to the internal discharge casing; and

a swing member which is positioned between the internal discharge casing and the external discharge casing and includes an opening/closing portion that swings when inhaling and exhaling,

the opening/closing part is closely attached to cover the internal discharge port when inhaling air, and swings to the external discharge port side when exhaling air.

31. The discharge valve for a mask according to claim 30, wherein,

the swing member includes a fixing portion connected to the opening and closing portion, and is combined with at least one of the internal discharge case and the external discharge case through the fixing portion.

32. The discharge valve for mask according to claim 31, wherein said discharge valve is a valve member having a valve body,

the fixing portion is formed at one side of the swing member,

the opening/closing portion extends from one side of the fixing portion to be located at a position facing the internal discharge port and the external discharge port, and has an area not smaller than the internal discharge port and not larger than the external discharge port.

33. The discharge valve for mask according to claim 31, wherein said discharge valve is a valve member having a valve body,

the fixed part is formed at the center of the swinging part,

the opening/closing portion extends around the fixing portion, is located at a position facing the internal discharge port and the external discharge port, and has an area not smaller than the internal discharge port and not larger than the external discharge port.

34. The discharge valve for mask according to claim 31, wherein said discharge valve is a valve member having a valve body,

the fixing portion is coupled with at least one of the inner discharge case and the outer case by coupling between a fixing hole and a fixing protrusion inserted therein.

35. The discharge valve for a mask according to claim 30, wherein,

the outer housing forms a restrictor rail that spans the outer discharge opening.

36. A mask, comprising:

a mask body provided with a through-discharge valve attachment hole; and

the discharge valve for a mask according to claim 30,

the discharge valve for the mask is mounted to the mask body through the discharge valve mounting hole.

37. The mask of claim 36 further comprising:

a filter part assembled in the mask main body; and

and two strap parts attached to the mask body at positions corresponding to the ears of the wearer.

38. The mask of claim 37 wherein,

the filter part includes: an inner filter housing, an outer filter housing, a filter mounting portion, and a filter;

the filter mounting part is positioned between the inner filter shell and the outer filter shell, and the inner filter shell and the filter mounting part are detachably connected;

the external filter shell is detachably connected with the filter mounting part, and an inflow port for allowing external air to flow in is arranged on the external filter shell;

the filter mounting part is provided with a first through hole, and the inner filter shell is provided with a second through hole communicated with the first through hole;

the filter is located on an air flow passage between the first through-hole and the inflow port, so that air flowing in from the inflow port flows into the first through-hole via the filter.

39. The mask of claim 38 wherein,

the filter is a cylindrical filter with a hollow part, one end above the filter is abutted with the inner wall of the outer filter shell, and the other end below the filter is abutted with the inner wall of the filter mounting part facing to one side of the outer filter shell; the inlet port of the outer filter case is located above the hollow portion, and the first through-hole is located between the outer edge of the filter mounting portion and the outer edge of the filter.

40. The mask of claim 38 wherein,

the internal filtering shell and the filter mounting part are connected through magnetism.

41. The mask of claim 37 wherein,

the two sling parts are respectively provided with two belt fixing parts connected by a connecting part,

the two sling portions are connected by a strap connected to the two strap fastening portions,

the connecting part is provided with a strip-shaped hook part connected with the mask body, the mask body is provided with a hanging strip part assembling hole, and the strip-shaped hook part is connected with the hanging strip part assembling hole in a clamping manner.

42. The mask of claim 37 wherein,

the two sling parts are respectively provided with two belt fixing parts connected by a connecting part,

the two sling portions are connected by a strap connected to the two strap fastening portions,

the mask is characterized in that the connecting part is provided with a plurality of bulges connected with the mask main body, the mask main body is provided with mounting holes matched with the bulges, and the bulges are connected with the mounting holes in a clamping manner.

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