KR100719093B1 - Exhaust system of face mask - Google Patents

Abstract

The present invention relates to an exhaust device for a face mask. An exhaust device of the present invention is a face mask comprising a mask body covering a person's nose and mouth, wearing means for wearing the mask body on the face, and a filter for purifying air sucked into the mask body, wherein the exhaust device is installed on the mask body. A valve body having a valve hole communicating with the outside of the mask body and a valve seat formed around an outer periphery of the valve hole; A flexible valve flap seated on the valve seat and opening the valve hole while elastically deforming when the wearer spits air, and blocking the valve hole while elastically restoring when the wearer breathes in the air; And a movement means capable of moving between a spaced position separating the flexible valve flap from the valve seat and a seating position seated on the valve seat. Since the present invention has a structure that can set whether the air intake through the valve hole according to the wearer's choice, it is possible to intake air through the valve hole in the clean zone, so that breathing in the clean zone is very comfortable and easy Has an effect.

Description

EXHAUST SYSTEM OF FACE MASK

1 is a cross-sectional view showing a typical face mask,

2 is a cross-sectional view showing the configuration of an exhaust device for a face mask according to the present invention;

3 is an enlarged cross-sectional view showing an enlarged exhaust device of the face mask according to the present invention;

4 is an operation diagram showing an operation example of the flexible valve flap movement means constituting the exhaust device of the present invention;

5 is a view showing a modification of the position holding means constituting the exhaust device of the present invention;

6 is an operation diagram showing an operation example of the position holding means of the modification;

7 is a view showing a modification of the flexible valve flap movement means constituting the exhaust device of the present invention;

8 is an operation diagram showing an operation example of the flexible valve flap movement means of the modification;

9 is a view showing another modified example of the flexible valve flap movement means constituting the exhaust device of the present invention;

10 is an operation diagram showing an operation example of the flexible valve flap movement means of another modification.

♣ Explanation of symbols for main part of drawing ♣

1: mask body 3: filter

10: exhaust hole 20: exhaust valve

22: Valve Body 25: Valve Hole

26: Valve Seat 28: Support Plate

28a: guide hole 29: support rod

30: flexible valve flap 32: operation handle

40, 42: first elastic projection pair 44, 46: second elastic projection pair

50: spring 52, 54: elastic projection pair

60: folding piece 62: operation handle

70: hinge piece 72: operation handle

80: jam hook 82: jam groove

84: elastic pressing piece

The present invention relates to an exhaust device for a face mask for exhausting air spewed by the wearer, and more particularly, an exhaust device for a face mask capable of smoothly breathing in a clean area by allowing air inhalation as necessary. It is about.

In a workplace where noxious gas is generated, a noxious gas masking face mask (hereinafter referred to as "face mask") must be worn in order to block the harmful gas from entering the human body through the respirator.

An example of a face mask is shown in FIG. 1. This technique comprises a mask body 1 in close contact with the face, an edge filter portion 3 of the mask body 1, and an exhaust device 5 provided in the mask body 1.

In particular, the exhaust device 5 is composed of an exhaust hole 6 formed in the mask body 1 and an exhaust valve 7 provided in the exhaust hole 6, and the exhaust valve 7 includes an exhaust hole 6. Valve body (8) having a valve hole (8a) in communication with the valve, and the valve body (8a) to open the valve hole (8a) when the wearer spits out air, and to block the valve hole (8a) when the wearer breathes in air It consists of a flexible valve flap 9 installed on the body 7.

According to the conventional facial mask having such a configuration, first, the mask body 1 is worn so as to cover the nose and mouth, and when the air is inhaled, the outside air is filtered out of the filter unit 3 provided in the mask body 1. Pathogens or fine dusts are removed while passing through), and the removed clean air is introduced into the mask body 1.

When the wearer exhales air, the flexible valve flap 9 of the exhaust valve 7 is deformed to open the valve hole 8a, and as the valve hole 8a is opened, the air spouted by the wearer is the valve hole. It is discharged to the outside through 8a and the exhaust hole 6.

On the other hand, since the flexible valve flap 9 of the exhaust valve 7 shuts off the valve hole 8a when the air is inhaled, air does not flow through the exhaust valve 7. Therefore, when the wearer breathes in the air, the outside air is always introduced only through the filter portion (3).

However, such a conventional facial mask is inconvenient to frequently wear and remove the mask when working between the "clean zone" free of harmful gases and the "contaminated zone" contaminated by harmful gases. For this reason, most of the "clean area" is wearing a mask. By the way, when wearing the face mask in the "clean zone", it is pointed out that the intake of air is not smooth due to the intake resistance by the filter unit 3, so that it is very difficult to breathe and frustrating.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to enable the air intake through the exhaust valve without the intake resistance as necessary, so as to smoothly breathe in the clean area It is to provide an exhaust device of the face mask that can be.

The present invention for achieving the above object is a facial mask comprising a mask body covering the nose and mouth of the person, wearing means for wearing the mask body on the face, and a filter for purifying the air sucked into the mask body A valve body installed in the mask body, the valve body communicating with the outside of the mask body and having a valve seat formed around the outer periphery of the valve hole; A flexible valve flap seated on the valve seat and opening the valve hole while elastically deforming when the wearer spits out air, and blocking the valve hole while elastically restoring when the wearer breathes in the air; And movement means capable of moving between the spaced apart position separating the flexible valve flap from the valve seat and a seating position seated on the valve seat.

The movement means includes a support rod for supporting the flexible valve flap; Said valve having a guide hole for axial movement of said support rod such that said support rod can move said flexible valve flap between a seated position and a spaced apart position while axially moving between a first position and a second position. A support plate of the body; And an operation knob extending outwardly from an end of the support rod to allow the wearer to move the support rod between the first position and the second position.

A position capable of holding the support rod in the first position where the flexible valve flap is moved to a seating position, and a position capable of maintaining the support rod in the second position, in which the flexible valve flap is moved to a spaced position It further comprises a holding means.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of an exhaust device for a face mask according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a side cross-sectional view showing an exhaust device of the face mask according to the present invention, FIG. 3 is an enlarged cross-sectional view showing an exhaust device of the present invention, and FIG. 4 is a cross-sectional view showing the operation of the exhaust device. First, the face mask will be briefly described with reference to FIG. 2 before looking at the exhaust device of the present invention.

The face mask has a mask body 1. The mask body 1 is a shape suitable for covering the user's nose and mouth, and is made of synthetic resin, for example, polyethylene, and is configured such that a predetermined space is formed between the user's nose and the mouth when worn.

The mask body 1 is provided with a filter 3. The filter 3 is provided along the end edge of the mask main body 1 and is corrugated so that a filtration area may be wide. The filter 3 filters out pathogens or fine dust contained in the air while introducing the outside air as the wearer inhales. Here, the filter 3 is preferably composed of a HEPA filter which is an ultra fine fiber yarn.

The mask body 1 is provided with a wearing means. The wearing means is a flexible freely fixed band (not shown), which is configured to be hooked behind the wearer's ear or head to prevent the mask body 1 from being separated from the wearer's face.

Next, the configuration of the exhaust system according to the present invention will be described in detail with reference to FIGS. 2 to 4. According to this, the exhaust device of the present invention includes an exhaust hole 10 formed in the mask body 1 and an exhaust valve 20 provided in the exhaust hole 10.

The exhaust hole 10 is formed at a position opposite to the lower part of the wearer's mouth to smoothly discharge the air spouted by the wearer.

The exhaust valve 20 has a valve body 22, and a valve chamber 24 and a valve hole 25 are formed in the valve body 22. In particular, the valve hole 25 is a circular hole which communicates the inside and the outside of the mask body 1 with each other, and a valve seat 26 is formed around the outer periphery.

And the valve body 22 has a support plate 28 which is provided at intervals in front of the valve hole 25, the support plate 28 has a support rod extending toward the center of the valve hole 25 (29) is installed.

On the other hand, the flexible valve flap 30 is provided at the end of the support rod 29. The flexible valve flap 30 is a thin plate-shaped body of flexible elastic material, which is configured to be seated on the valve seat 26, and the valve hole 25 is formed by its elasticity in the state seated on the valve seat 26. Is blocking.

The flexible valve flap 30 opens the valve hole 25 when the wearer exhales the air to discharge the air spited out by the wearer, and blocks the valve hole 25 when the wearer breathes in the air. Shut off the inflow.

Again, referring to FIGS. 2 to 4, the exhaust device of the present invention, from the seating position A for seating the flexible valve flap 30 on the valve seat 26 as required, from the valve seat 26. It is provided with a movement means capable of movement between the spaced apart position (B) to be spaced.

The movement means includes a support rod 29 supporting the flexible valve flap 30 and a guide hole 28a formed in the support plate 28 so as to guide the axial movement of the support rod 29. Equipped.

The support rod 29 moves in the axial direction while supporting the flexible valve flap 30. At this time, the position for moving the flexible valve flap 30 to the seating position A is "first position (C)" and the position for moving the flexible valve flap 30 to the spaced position B is "second position". Let's call it (D).

And the movement means, the operation handle 32 extending outward from the end of the support rod 29 so that the wearer can move the support rod 29 between the first position (C) and the second position (D) It is further provided.

By this movement means, when the wearer pulls the operation knob 32, as shown in Fig. 4, the support rod 29 connected to the operation knob 32 is moved outwardly from the first position C of the inner side. As it moves to the second position (D) and the support rod 29 moves to the second position (D), the flexible valve flap 30 installed thereon is also spaced apart from the valve seat 26 to the spaced position (B). Open the valve hole 25 completely.

As a result, the valve hole 25 is completely opened, so that the valve hole 25 not only discharges the air spouted by the wearer but also introduces external air when the wearer breathes the air. Therefore, it is possible to inhale the air through the valve hole 25, and thus to facilitate the breathing in the clean area.

Then, when the wearer pushes the operation knob 32, as shown in Figure 3, the support rod 29 connected to the operation knob 32 is moved to the inner first position (C), the support rod 29 As the) moves to the first position C, the flexible valve flap 30 installed therein also moves to the seating position A of the valve seat 26 to block the valve hole 25.

As a result, by blocking the valve hole 25, the valve hole 25 discharges only the air spouted by the wearer, so that the intake of air through the valve hole 25 in the contaminated area is blocked at the source.

According to the exercise means having such a configuration, it is possible to set whether or not to suck the air through the valve hole 25 according to the wearer's choice, so that the air can be sucked through the valve hole 25 in the clean area, and thus clean Breathing in the area is very comfortable and easy.

Again, referring to FIGS. 2 to 4, the exhaust device of the present invention maintains the support rod 29 in the first position C in which the flexible valve flap 30 is moved to the seating position A. FIG. And a position holding means capable of holding the support rod 29 in the second position D in which the flexible valve flap 30 is moved to the spaced position B. FIG.

Position holding means, the first elastic projection pair (40, 42) projecting at intervals around one side of the support rod 29 and the second elastic projecting at intervals around the other side of the support rod 29 And a guide hole 28a of the support plate 28 caught between the protrusion pairs 44 and 46 and the first elastic protrusion pairs 40 and 42 or the second elastic protrusion pairs 44 and 46.

The first elastic protrusion pairs 40 and 42 protrude in an annular shape at intervals around one side of the support rod 29, and as shown in FIG. 3, the support rod 29 has a first position ( When exercising at C), the first elastic projection pairs 40 and 42 are configured to be caught by both edges of the guide hole 28a. That is, the first elastic projection pairs 40 and 42 having larger diameters are located in both the guide holes 28a. Therefore, the flexible valve flap 30 installed in the support rod 29 is restricted by the movement of the support rod 29 in the first position C and the movement of the support rod 29 in the first position C. ) Is held at the seating position (A).

The second elastic protrusion pairs 44 and 46 protrude in an annular form at intervals around the other side of the support rod 29, and as shown in FIG. 4, the support rod 29 is positioned in the second position ( When moving in D), the second elastic projection pairs 44 and 46 are configured to be caught by both edges of the guide hole 28a. That is, the second elastic projection pairs 44 and 46 having larger diameters are located in both the guide holes 28a. Therefore, the flexible valve flap 30 provided in the support rod 29 is restricted by the movement of the support rod 29 in the second position D and the movement of the support rod 29 in the second position D. ) Is kept at the spaced position (B).

Projections "42" and "44" located inside the first elastic protrusion pairs 40 and 42 and the second elastic protrusion pairs 44 and 46, respectively, do not normally pass through the guide holes 28a. When the force is applied, the guide hole 28a is formed to a size that can pass through. Further, the projections 40 and 46, which are located outside the first elastic protrusion pairs 40 and 42 and the second elastic protrusion pairs 44 and 46, respectively, may open the guide hole 28a even when a force is applied. It is formed to a size that cannot pass.
Here, the first elastic protrusion pairs 40 and 42 and the second elastic protrusion pairs 44 and 46 are made of an elastic body, and when the wearer pulls or pushes the operation handle 32 with a force greater than or equal to a set value, The protrusions 42 and 44 located inside the first elastic protrusion pairs 40 and 42 and the second elastic protrusion pairs 44 and 46 move the support rod 29 while passing through the guide holes 28a. Will be allowed.

According to this position holding means, since the flexible valve flap 30 moved to the seating position A is fixed in position, the flexible valve flap 30 seated on the valve seat 26 is arbitrarily removed from the valve seat 26. To prevent separation.

In addition, since the flexible valve flap 30 moved to the spaced position B is fixed in position, the flexible valve flap 30 spaced from the valve seat 26 is moved to the valve seat 26 to be seated. prevent.

5 and 6 show a modification of the position holding means. The position holding means of the modification is a spring 50 for elastically pressing the support rod 29 in the first position C direction, and a pair of elastic protrusions 52 and 54 which protrude at intervals around the support rod 29. ) And the guide hole 28a which is caught between the pair of elastic protrusions 52 and 54 of the support rod 29 moved to the second position D to restrict the movement of the support rod 29.

In particular, the spring 50 is composed of a conical coil spring, and the support rod 29 is always elastically pressurized in the first position C to maintain the support rod 29 in the first position C. Of course, the flexible valve flap 30 is installed to maintain the position in the seating position (A). That is, in the first position C, the flexible valve flap 30 is fixed in the seating position A by the elastic force of the spring 50, and in the second position D, the small elasticity indicated by " 52 " It is to maintain a fixed state in the spaced position (B) by the projection pair and the spring (50).

The position holding means of this modification is a structure for holding the flexible valve flap 30 in the seating position (A) by the elastic force of the spring 50, so that the flexible valve flap 30 without applying a separate force It is possible to return to the seating position (A) and to maintain the position, thus very simple to use.

Next, an operation example of the present invention having such a configuration will be described with reference to FIGS. 2 to 4. First, look at the use in the contaminated area. According to this, as shown in FIG. 2 and FIG. 3, in the state which the flexible valve flap 30 moved to the seating position A, it breathes in air. Then, while the air in the contaminated zone passes through the filter 3 installed in the mask body 1, pathogens and fine dust are removed, and the removed clean air flows into the mask body 1.

When the wearer exhales air, the flexible valve flap 30 of the exhaust valve 20 is deformed and the valve hole 25 is opened. As the valve hole 25 is opened, the air spouted by the wearer is the valve hole 25. ) And is discharged to the outside through the exhaust hole (10).

Here, since the flexible valve flap 30 of the exhaust valve 20 blocks the valve hole 25 when inhaling air, air is not sucked in through the exhaust valve 20. Therefore, when the wearer breathes in the air, the outside air is always introduced only through the filter (3).

Next, look at the use of the clean area. According to this, the wearer wearing the mask body 1 moves to the clean area and then pulls the operation knob 32 of the exhaust valve 20 to the outside as shown in FIG. 4. Then, as the support rod 29 connected to the operation knob 32 moves to the second position D, and the support rod 29 moves to the second position D, the flexible valve flap 30 is installed. Is also spaced apart from the valve hole 25 to the spaced position (B) to completely open the valve hole 25.

As a result, the fully open valve hole 25 not only discharges the air spouted by the wearer but also introduces external air when the wearer breathes in the air. Therefore, it is possible to inhale the air through the valve hole 25, thereby making it possible to very breathe in the clean zone.

On the other hand, when the wearer wearing the mask body 1 returns to the contaminated zone again, as shown in FIG. 3, the operation knob 32 of the exhaust valve 20 is pushed inward to pressurize it. Then, the support rod 29 connected to the operation knob 32 is also returned to the first position C of the inner side, and the flexible valve flap installed thereon as the support rod 29 returns to the first position C. 30 also closes the valve hole 25 while moving to the seating position (A).

As a result, the valve hole 25 blocked by the flexible valve flap 30 discharges only the air spouted by the wearer, so that the intake of air through the valve hole 25 in the contaminated area is essentially blocked.

According to the exhaust device of the present invention having such a configuration, it is possible to set whether or not to suck the air through the valve hole 25 in accordance with the selection of the wearer, it is possible to suck the air through the valve hole 25 in the clean area. Therefore, it has the advantage that breathing in the clean area is very comfortable and easy.

Next, Fig. 7 and Fig. 8 are views showing modifications of the movement means constituting the exhaust device of the present invention.

The movement means of the modification is between the support plate 28 for supporting the flexible valve flap 30 and the support plate 28 between the folded position Q and the extended position R with respect to the valve body 22. A plurality of foldable pieces 60 connecting the support plate 28 and the valve body 22 so as to be foldable at the same, and are extended outward so that the wearer can fold the support plate 28 while pulling or pushing the support plate 28. It is composed of an operation knob 62.

In particular, the plurality of folds 60 is a thin plate made of a synthetic resin material, consisting of a first folded portion (60a) and a second folded portion (60b) folded in the first folded portion (60a), As the first folded portion 60a and the second folded portion 60b are folded or unfolded with each other, the support plate 28 is folded between the folded position Q and the extended position R, and thus the support plate ( The flexible valve flap 30 supported by 28 is moved between the seating position (A) and the spaced position (B).

In the movement means of this modification, the wearer pulls the operation handle 62. Then, as shown in FIG. 8, the support plate 28 on which the operation handle 62 is installed also unfolds to the outwardly extended position R, and as the support plate 28 unfolds to the outwardly extended position R, as shown in FIG. The flexible valve flap 30 supported on the support plate 28 also opens the valve hole 25 completely while being spaced apart from the valve hole 25 to the spaced position B. FIG.

Then, when the wearer pushes the operation handle 62, as shown in Figure 7, the operation handle 62 and the support plate 28 installed is also folded to the inner folded position (Q), the support plate 28 As the flexible valve flap 30 supported by the support plate 28 also moves to the seating position A as it is folded to the inner folded position Q, the valve hole 25 is blocked.

On the other hand, the folding piece of synthetic resin material 60, when the support plate 28 is moved between the extended position (R) and the folded position (Q), the elastic bar is folded and folded, the folding piece (60) Keep folded or unfolded. Therefore, the support plate 28 supported on the folding piece 60 is also maintained in the folded position (Q) or the extended position (R), accordingly, the flexible valve flap 30 installed on the support plate 28 also seated position The valve hole 25 can be blocked while being maintained at (A), or the valve hole 25 can be completely opened while being held at the spaced position (B).

Next, FIGS. 9 and 10 are views showing another modified example of the support rod movement means.

Another variation of the movement means is the support plate 28 for supporting the flexible valve flap 30 and the first position in which the support plate 28 seats the flexible valve flap 30 on the valve seat 26. A hinge piece 70 rotatably connecting the support plate 28 and the valve body 22 so as to be rotatable between (X) and the second position Y spaced apart from the valve seat 26; It is composed of an operation handle 72 is formed on the outside so that the wearer can rotate the support plate 28.

In particular, the hinge piece 70 is a thin synthetic resin material, which is capable of bending deformation, and allows the support plate 28 to rotate between the first position (X) and the second position (Y). It allows the flexible valve flap 30 to move between the seating position A and the spaced position B while exercising.

When the wearer pulls the operation handle 72 by the movement means of this modification, as shown in FIG. 10, the support plate 28 on which the operation handle 72 is installed also rotates to the second position Y on the outer side. In addition, as the support plate 28 rotates to the second position Y on the outside, the flexible valve flap 30 supported on the support plate 28 is also spaced apart from the valve hole 25 in the spaced position B. Open the valve hole 25 completely.

Then, when the wearer pushes the operation knob 72, as shown in Figure 9, the operation handle 72 and the support plate 28 installed also rotates to the inner first position (X), the support plate 28 As the) rotates to the inner first position X, the flexible valve flap 30 supported on the support plate 28 also rotates to the seating position A, thereby blocking the valve hole 25.

On the other hand, the movement means of the other modified example can hold the support plate 28 of the 1st position X which moved the flexible valve flap 30 to the seating position A, and the flexible valve flap 30 It is provided with a position holding means capable of holding the support plate 28 of the second position (Y) in which is moved to the separation position (B).

The position holding means is formed on the valve body 22 so that the hook hook 80 formed on the support plate 28 and the hook hook 80 of the support plate 28 rotated to the first position X are engaged. It is provided with a locking groove (82). In particular, since the locking groove 82 has a structure in which the locking hook 80 of the supporting plate 28 rotated to the first position X, the supporting plate 28 is held in the first position X. To be able.

And the position holding means is provided with the elastic pressing piece 84 which elastically presses the support plate 28 rotated to the 2nd position Y to a 2nd position direction. The elastic pressing piece 84 allows the support plate 28 to be held in the second position Y by elastically pressing the support plate 28 in the second position Y direction.

Here, the elastic pressing piece 84 allows the rotation of the support plate 28 while elastically deformed when the support plate 28 rotates to the first position (X).

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, according to the exhaust device of the face mask according to the present invention, it is possible to set whether or not to intake air through the valve hole according to the wearer's choice, so that the air intake through the valve hole in the clean area is possible. Therefore, the breathing in the clean area is very comfortable and easy.

Claims (9)

A face mask comprising a mask body covering a person's nose and mouth, wearing means for wearing the mask body on the face, and a filter for purifying air sucked into the mask body, A valve hole 25 provided in the mask body 1 and communicating with the outside of the mask body 1 and a valve seat 26 formed around the outer periphery of the valve hole 25. Having a valve body 22; Is seated in the valve seat 26, the wearer spouts the air is elastically deformed to open the valve hole 25, and when the wearer breathes in the air is elastically restored to block the valve hole 25 A valve flap 30; A support rod 29 for supporting the flexible valve flap 30 and a first position C for seating the flexible valve flap 30 on the valve seat 26 and a space between the valve seat 26 and the valve seat 26. A support plate 28 of the valve body 22 having a guide hole 28a for axial movement of the support rod 29 between the second position D, and a wearer of the support rod 29 And movement means comprising an operation knob 32 extending outwardly from an end of the support rod 29 so as to allow movement between the first position C and the second position D. Face mask exhaust. delete The method of claim 1, The support rod 29 of the first position C, which has moved the flexible valve flap 30 to the seating position A, can be held in position, and the flexible valve flap 30 is spaced apart from the position B. And a position holding means for holding the support rod (29) at the second position (D) moved to the position (). The method of claim 3, wherein The position holding means, First elastic protrusion pairs 40 and 42 projecting at intervals around one side of the support rod 29; Second elastic protrusion pairs 44 and 46 projecting at intervals around the other side of the support rod 29; The support rod is caught between the first elastic projection pairs 40 and 42 of the support rod 29 which is moved to the first position C for seating the flexible valve flap 30 on the valve seat 26. Second elastic protrusion pairs 44 and 46 of the support rod 29 which are restricted in movement of the 29 or move to the second position D which separates the flexible valve flap 30 from the valve seat 26. And a guide hole (28a) for limiting the movement of the support rod (29) between the). The method of claim 3, wherein The position holding means, A spring (50) for elastically pressing the support rod (29) in the first position (C) direction; Pairs of elastic protrusions 52 and 54 protruding at intervals around the support rod 29; The support rod 29 is caught between the pair of elastic protrusions 52 and 54 of the support rod 29 which moves the flexible valve flap 30 to the second position D spaced apart from the valve seat 26. And a guide hole (28a) for limiting the movement of the face mask. The method of claim 1, The exercise means, A support plate 28 for supporting the flexible valve flap 30; In order to allow the support plate 28 to fold between the folded position (Q) and the extended position (R) while moving the flexible valve flap 30 between the seating position (A) and the spaced position (B), A plurality of folding pieces (60) for foldably connecting said support plate (28) to said valve body (22); A face comprising a manipulation knob 62 extending outward from the support plate 28 so that the wearer can fold the support plate 28 between the folded position Q and the extended position R. Exhaust of the mask. The method of claim 1, The exercise means, A support plate 28 for supporting the flexible valve flap 30; While the support plate 28 pivots between a first position X for seating the flexible valve flap 30 on the valve seat 26 and a second position Y away from the valve seat 26, Hinge piece for pivotally connecting the support plate 28 with respect to the valve body 22 so that the flexible valve flap 30 can be moved between a seating position A and a spaced position B. 70 and; And a manipulation knob 72 provided on the support plate 28 so that the wearer can pivot the support plate 28 between the first position X and the second position Y. Exhaust of the face mask. The method of claim 7, wherein The support plate 28 of the first position X having the flexible valve flap 30 seated on the valve seat 26 may be held in position, and the flexible valve flap 30 may be held by the valve seat 26. And a position holding means for holding the support plate (28) at a second position (Y) spaced from the position. The method of claim 8, The position holding means, A hook hook 80 formed on the support plate 28; It is formed in the valve body 22 so that the latching hook 80 of the support plate 28 rotated to the first position X seating the flexible valve flap 30 on the valve seat 26 to be held. A catching groove 82; It includes an elastic pressing piece 84 for elastically pressurizing the support plate 28 rotated in the second position (Y) to move the flexible valve flap 30 from the valve seat 26 in the second position direction. An exhaust device for a facial mask.

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