WO2023277353A1

WO2023277353A1 - Ventilation device for air respirator mask

Info

Publication number: WO2023277353A1
Application number: PCT/KR2022/007519
Authority: WO
Inventors: 김영수; 김병철
Original assignee: 주식회사 케이디펜스
Priority date: 2021-06-28
Filing date: 2022-05-26
Publication date: 2023-01-05
Also published as: KR102352619B1

Abstract

The present invention relates to a ventilation device for an air respirator mask. The ventilation device according to an embodiment of the present invention is installed in a mask body of the air respirator mask, wherein the mask body is worn on the face of a user, and is connected to an air tank to provide an inhalation flow path between an inner space of the mask body and the air tank and an exhalation flow path between the inner space and the outside, and the ventilation device comprises: a valve connector which is installed in the mask body and onto the mask body; a connector cover which is coupled to the valve assembly from outside of the mask body; and a manual opening/closing valve which is arranged on the connector cover and is rotationally manipulated to allow the air in the exhalation flow path to flow bi-directionally. According to the present invention, the air in the exhalation flow path, through which exhalation of a mask wearer is discharged to the outside, can selectively flow bi-directionally, and thus, the wearer can inhale outside air while wearing the mask according to his/her choice. Thus, air consumption in the air tank can be minimized, and as such, it is possible to extend the time to carry out firefighting and life-saving works in and out of a fire scene.

Description

Ventilation device for respirator mask

The present invention relates to a ventilation device for an air respirator mask, and more particularly, to selectively flow air in both directions in an exhalation passage through which the exhaled breath of the mask wearer is discharged to the outside, so that the mask is worn according to the wearer's choice. It relates to a ventilation device for an air respirator mask that allows outside air to be inhaled even in the air.

Firefighters performing firefighting and lifesaving work at a fire site where toxic gases are generated must be supplied with fresh air. To this end, firefighters wear self-contained breathing apparatus (SCBA) firefighting and lifesaving operations.

The air respirator connects the air container (air container) loaded in the form of a backpack on the back of the firefighter to the mask worn on the face of the firefighter, depressurizes the fresh air contained in the airbox, and provides it to the firefighter through the mask. .

A conventional air respirator mask has a see-through window installed to shield the wearer's face so as to be transparent, and a ventilation device connected to the air cylinder of the air respirator. At this time, the ventilation device includes an inhalation flow path that communicates the facial space and the air container (air container) to supply air from the air container (air container) to the wearer's shielded facial space when the wearer breathes in, and the wearer's exhalation flow when the wearer exhales. To discharge to the outside, an exhalation passage that communicates the facial space and the outside is formed. A check valve is disposed in the exhalation passage so that the wearer's exhalation is discharged to the outside, but the exhalation passage is blocked during the wearer's inhalation, so that the wearer does not inhale external air. Therefore, the wearer inhales air only through the inhalation flow path and exhales air only through the exhalation flow path while wearing the conventional air respirator mask.

However, the air in the air box is limited, and the fire suppression and lifesaving operation time at the fire site may be determined according to the remaining air amount in the air box. However, before entering the fire site, firefighters must wear a mask from outside the fire site to check the shielding state of the mask and prepare for entry. And the conventional air respirator mask has a problem that the air in the air box is consumed because the wearer inhales air only through the inhalation flow path even in the state of wearing the mask before entering the fire scene.

The present invention is to solve the problems of the prior art mentioned above, and the object of the present invention is to selectively make the air flow of the exhalation passage through which the exhalation of the mask wearer is discharged to the outside, so that the wearer's choice Accordingly, to provide a ventilation device for an air respirator mask that allows outside air to be inhaled even while wearing the mask.

Ventilation device for an air respirator mask according to an embodiment of the present invention is mounted on a mask body worn on a user's face in an air respirator mask and is connected to an air chamber, and is connected to an air passage between the inner space of the mask body and the air box and between the inner space and the outside. In the ventilation device providing an exhalation flow path, a valve connection body mounted on the mask body from the inside of the mask body, a connection body cover coupled to the valve connection body from the outside of the mask body, and a connection body cover disposed on the connection body cover and rotated to exhalation flow path It includes a manual on-off valve that allows the air flow to be made in both directions.

At this time, the ventilation device further includes a check valve unit having a check valve for passing air flow in a direction going out from the exhalation flow path and blocking air flow in a direction flowing into the inner space, and the valve connection body is part of the exhalation flow path. It has an exhalation passage hole forming a section, and the check valve unit is connected to the manual opening and closing valve, and is disposed to block the exhalation passage hole or to be spaced apart from the exhalation passage hole so that the manual opening and closing valve is opened. can

In addition, through a cam structure that converts rotational motion into linear motion, when the manual on-off valve is rotated, the check valve may be linearly moved in a direction approaching the exhalation passage hole or in a direction away from the exhalation passage hole.

In addition, the manual opening/closing valve includes an operating lever that is rotatably coupled to the coupling portion formed on the coupling body cover at a predetermined angle, a head portion coupled to the coupling portion together with the operating lever, and the coupling unit when the head unit is coupled to the coupling portion. It is provided with a protruding portion extending a predetermined length from one side of the head portion so as to protrude toward the inside of the connector cover through penetration, and includes a cam member that rotates together when the control lever rotates, and the cam member is rotated in a state coupled to the coupling portion. The protrusion distance of the protrusion is adjusted, and the check valve unit is coupled to the check valve and is provided with a connecting rod having a predetermined length connected to the end of the protrusion, so that when the protrusion protrudes a predetermined distance, the check valve may be disposed to block the exhalation passage hole. .

In addition, the coupling portion protrudes in a pipe shape so that the cam member is inserted and coupled to the inside, the coupled coupling portion and the cam member are inserted and coupled so as to cover the control lever, and the head unit is coupled to the control lever and the cam member. A locking protrusion may be provided so as to be hooked on the inner surface of the operating coupling body cover and rotate together.

In addition, along the inner circumferential surface of the engaging portion, a triangular first cam embossed and first cam indented are formed, and along an outer circumferential surface of the head portion, a second cam embossed corresponding to the first cam embossed and a second cam corresponding to the first cam embossed are formed. An intaglio is formed, the first cam embossment and the second cam intaglio are combined, and the first cam intaglio and the second cam embossment are combined to form a cam structure.

In addition, the manual opening/closing valve further includes a first elastic spring disposed between the operating lever and the cam member to press the cam member toward the inside of the coupling body cover, and the operating lever is operated by pressing the first elastic spring and the cam structure. Rotational force may be applied in one direction.

In addition, a locking groove is formed at the apex of the first cam relief or the second cam relief, and when the operating lever is rotated a predetermined distance in the other direction, the apex of the first cam relief is caught in the locking groove of the second cam relief, or A vertex of the two cam reliefs is caught in the locking groove of the first cam relief, and a rotational manipulation angle may be maintained.

In addition, the connection body cover has a supply valve connection portion protruding around one side of the coupling portion so that the connection hose is coupled to be connected to the air cylinder, and the manual opening and closing valve is maintained in a coupled state to the coupling portion of the operating lever and cam member. , It further includes a coupling pin inserted into the operating lever and caught on the coupling portion, and in a state in which the operating lever is rotated so that the check valve blocks the exhalation passage hole, the departure direction of the coupling pin inserted into the operating lever is the supply valve connection can be headed

According to the present invention, the air flow of the exhalation passage through which the exhalation of the mask wearer is discharged to the outside is selectively made in both directions, so that the wearer can inhale external air even while wearing the mask according to the choice of the wearer, Air consumption can be minimized, and through this, firefighting and lifesaving work hours can be extended inside the fire site.

1 is an exploded perspective view of an air respirator mask to which a ventilation device according to an embodiment of the present invention is applied.

2 is an exploded perspective view of a ventilation device according to an embodiment of the present invention.

Figure 3 (a), (b) is a view showing the coupling direction of the coupling pin according to the operating angle of the operating lever in the ventilation device for an air respirator mask according to an embodiment of the present invention.

4 is a cross-sectional view showing a state in which an exhalation passage hole is blocked in the ventilation device according to an embodiment of the present invention.

5 is a cross-sectional view showing a state in which an exhalation passage hole of a valve connection body is opened in a ventilation device according to an embodiment of the present invention.

6 is a view showing an inner circumferential surface of a coupling part of a connector cover in a ventilation device according to an embodiment of the present invention.

7 is a view showing the outer surface of the head of the cap member in the ventilation device according to an embodiment of the present invention.

8(a) and (b) are diagrams conceptually shown to explain a cam structure of a ventilation device according to an embodiment of the present invention.

It should be noted that technical terms used in the present invention are only used to describe specific embodiments and are not intended to limit the present invention. In addition, technical terms used in the present invention should be interpreted in terms commonly understood by those of ordinary skill in the art to which the present invention belongs, unless specifically defined otherwise in the present invention, and are excessively inclusive. It should not be interpreted in a positive sense or in an excessively reduced sense. In addition, when the technical terms used in the present invention are incorrect technical terms that do not accurately express the spirit of the present invention, they should be replaced with technical terms that those skilled in the art can correctly understand.

Also, singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various elements or steps described in the invention, and some of the elements or steps are included. It should be construed that it may not be, or may further include additional components or steps.

In addition, it should be noted that the accompanying drawings are only for easily understanding the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the accompanying drawings.

Hereinafter, a ventilation device for an air respirator mask according to the present invention will be described in more detail with reference to the accompanying drawings.

Hereinafter, prior to the description of the ventilation device according to an embodiment of the present invention, the ventilation device according to the present embodiment will be schematically described as an air respirator mask.

In addition to the ventilation device 10, the air respirator mask to which the ventilation device 10 according to the present embodiment is applied is disposed between the mask body 1 worn on the wearer's face and the ventilation device 10 and the mask body 10 It may include a seat seal 3 and a nose mask 5 worn in the space around the wearer's mouth and nose.

The mask body 1 is worn to cover the wearer's face and forms an inner space in which the wearer's face is disposed. Also, a coupling hole to which the ventilation device 10 is coupled may be formed in the mask body 1 . The ventilation device 10 is mounted on the mask body 1 through a coupling hole of the mask body 1 and is connected to the air chamber, so that an inhalation flow path between the inner space of the mask body 1 and the air cylinder and an exhalation flow path between the inner space and the outside are connected. can provide. Here, the inner space is a space in which air inflow from the outside is blocked while the respirator mask is connected to the air box, but the ventilation device 10 according to the present embodiment can selectively allow outside air to flow in by the wearer's operation. there is.

The sheet seal 3 may be disposed between the coupling hole of the mask body 1 and the ventilation device 10 to form an airtight seal when the ventilation device 10 is coupled to the mask body 1 . The nose mask 5 is coupled with the ventilation device 10 on the inside of the mask body 1, and is closely adhered to the wearer's mouth and nose to open the space around the wearer's mouth and nose in the inner space of the mask body 1 to another. space can be separated.

The air respirator mask is connected to the air cylinder through a separate pressure reducing valve mounted on the back support to receive air from the air cylinder. At this time, a separate supply valve is connected to one side of the aeration device 10, and the aeration device 10 separates an inhalation passage for supplying air supplied from the air box to the wearer and an exhalation passage through which the wearer's exhalation is discharged to the outside. can be formed by

Specifically, the inhalation flow path may be formed to be sequentially connected from the hose to the ventilation device 10, the outer space of the nose mask 5 among the inner spaces of the mask body 1, and the inner space of the nose mask 5. At this time, the air in the outer space of the nose mask 5 flows into the inner space of the nose mask 5, but the nose mask 5 prevents the air in the inner space of the nose mask 5 from flowing into the outer space of the nose mask 5. One or more intake valves may be disposed.

The exhalation passage may be formed to communicate from the inner space of the nose mask 5 to the outside via the ventilation device 10 . At this time, the intake valve enables air flow from the outer space of the nose mask 5 to the inner space of the nose mask 5, but blocks the air flow from the inner space of the nose mask 5 to the outer space of the nose mask 5. can That is, the wearer's exhaled breath is blocked by the intake valve, so that it cannot flow from the inner space of the nose mask 5 to the outer space of the nose mask 5, and can flow to the outside through the ventilation device 10.

2 is an exploded perspective view of a ventilation device according to an embodiment of the present invention, and FIG. 3 (a) and (b) are at an angle of operation of a control lever in a ventilation device for an air respirator mask according to an embodiment of the present invention. It is a drawing showing the coupling direction of the coupling pin according to.

Hereinafter, each configuration of the ventilation device 10 according to the present embodiment will be schematically reviewed with reference to FIG. 2 .

To this end, the ventilation device 10 according to the present embodiment is coupled with the valve connection body 100 mounted on the mask body 1 from the inside of the mask body 1 and the valve connection body 100 from the outside of the mask body. Consisting of a connecting body cover 300, a manual opening/closing valve 500 that allows air flow in one or both directions in the exhalation passage according to manipulation by the wearer, and a check valve unit 700 disposed in the exhalation passage It can be.

The valve connection body 100 may be press fit into the coupling hole of the mask body in the inner space of the mask body 1 . In addition, an exhalation passage hole 110 forming a partial section of the exhalation passage may be formed in the valve connection body 100 .

The connecting body cover 300 is coupled to cover the valve connecting body 100 exposed to the outside of the mask body 1 in a state in which the valve connecting body 100 is coupled to the mask body, and is forced to the valve connecting body 100. Fitting can be combined. In addition, a screw may be fastened to fix a coupled state between the valve connecting body 100 and the connecting body cover 300 .

A coupling part 310 to which the manual opening/closing valve 500 is coupled may be formed in the connecting body cover 300, and a supply valve connection part 320 to which a supply valve is connected to connect an air cylinder. At this time, the coupling part 310 may protrude into a pipe shape.

The manual opening/closing valve 500 includes an operating lever 510 that is rotated by the wearer, a cam member 520 that rotates together when the operating lever 510 rotates, and between the operating lever 510 and the cam member 520. It may be configured to include a first elastic spring 530 interposed therebetween, and a coupling pin 540 for maintaining the coupling state of each component of the manual opening/closing valve with respect to the coupling portion 310 of the connector cover.

The control lever 510 is coupled to cover the outer circumferential surface of the coupling portion 310, and the manual opening/closing valve 500 is exposed to the front of the connector cover 300 in the coupled state and can be rotated by the wearer. The cam member 520 is inserted into and coupled to the inside of the coupling part 310, and one or more locking protrusions 5211 may be provided on one side of the outer circumferential surface. (510) When the control lever 510 is rotated by hanging on the inner circumferential surface, it can rotate together. The first elastic spring 530 may be disposed such that an elastic restoring force acts between the control lever 510 and the cam member 520 in a direction in which a distance between the control lever 510 and the cam member 520 is increased. Also, the coupling pin 540 may be inserted into the operating lever 510 so that the operating lever 510 and the cam member 520 remain coupled to the coupling portion 310 of the connector cover 300 and are fixed.

At this time, a pin insertion hole 511 having a predetermined length in the circumferential direction is formed in the control lever 510 so that the coupling pin 540 can be inserted, and a pin insertion groove formed in the circumferential direction is formed in the coupling portion 310. can When the coupling pin 540 is inserted into the pin insertion hole 511 in a state where the control lever 510 and the cam member 520 are coupled to the coupling portion 310 with the first elastic spring 530 interposed, A portion of the coupling pin 540 is caught in the pin insertion groove so that the operating lever 510 and the cam member 520 may be coupled to each other.

The control lever 510 can be rotated at a predetermined angle in a coupled state, and the air flow in the exhalation passage can be made in both directions or in one direction according to the manipulation angle of the control lever 510 . Here, when the air flow in the exhalation passage is made in both directions, the outside air can flow into the inner space, so the wearer can breathe through the outside air flowing into the exhalation passage. Conversely, when the air flow in the exhalation flow path is unidirectional, since the outside air cannot flow into the inner space, the wearer can breathe only through the air in the air chamber introduced into the inhalation flow path.

At this time, the position of the pin insertion hole 511 in the circumferential direction can be arranged so that the operating angle of the control lever 510 faces the supply valve connection part 320 in an air cylinder breathing state in which the air flow in the exhalation passage is unidirectional. there is.

Referring to (a) of FIG. 3, the circumferential arrangement position of the pin insertion hole 511 is the supply valve connection portion when the operating angle of the control lever 510 is in an air cylinder breathing state in which air flow in the exhalation passage is made in one direction. It is disposed toward 320, and the coupling pin 540 inserted into the pin insertion hole 511 is caught on the protruding supply valve connection part 320 or the hose, and separation from the pin insertion hole 511 can be prevented. In such an airbox breathing state, the air flow in the exhalation flow path is operated in only one direction (the direction in which air is discharged to the outside), and the wearer may enter the fire scene. Therefore, the present invention can prevent the wearer from separating the coupling pin 540 and the manual opening/closing valve 500 during firefighting and lifesaving work at the fire site.

If you want to remove or insert the coupling pin 540, rotate the control lever 510 in one direction at a predetermined angle, as shown in (b) of FIG. 320), the coupling pin 540 may be removed or inserted. At this time, the state in which the control lever 510 is rotated at a predetermined angle in one direction is an external respiration state in which air flow in the exhalation passage is made in both directions, and in this external respiration state, the wearer is located in a relatively safe place. Therefore, even if the coupling pin 540 is unintentionally separated, a big problem does not occur.

On the other hand, the check valve unit 700 includes a check valve 710 that passes air flow in a direction going out from the exhalation passage and blocks air flow in a direction flowing into the inner space, and the check valve 710 is a cam member ( 520) and a connecting rod 720 of a predetermined length for interconnecting to move together, and a second elastic spring that presses the check valve 710 to come into close contact with the exhalation passage hole 110 when the check valve 710 is disposed in the exhalation passage hole 110. (730).

Ventilation device 10 according to this embodiment is mounted on the mask body 1 as described above to form an inhalation flow path and an exhalation flow path in the air respirator mask device. Unlike conventional ventilation devices, the ventilation device 10 according to this embodiment allows external air to flow into the inner space of the mask body 1 selectively through the exhalation flow path by the wearer's manipulation.

To this end, the check valve 710 is disposed in close contact with the exhalation passage hole 110 according to the operation of the control lever 510 to block the exhalation passage hole 110 so that the air flow in the exhalation passage is only in one direction (outward direction). To be made, or by being spaced apart from the exhalation passage hole 110 according to the manipulation of the control lever 510 to open the exhalation passage hole 110, the air flow in the exhalation passage can be made in both directions.

Hereinafter, referring to FIG. 4 , an air cylinder breathing state in which the exhalation passage hole 110 is blocked in the ventilation device and the air flow in the exhalation passage is made in one direction will be described in more detail.

First, the cam member 520 has a cam structure that converts rotational motion into linear motion, and when rotated, the check valve 710 is directed toward the approaching direction of the exhalation passage hole 110 or away from the exhalation passage hole 110. It can be moved linearly, and such a cam structure will be described later with reference to FIGS. 6 to 8.

The cam member 520 includes a head portion 521 coupled to the coupling portion together with the control lever 510, and when the head portion 521 is coupled to the coupling portion 310, the head portion 521 passes through the coupling portion 310 to cover the connection body. 300 may include a protruding portion 522 extending a predetermined length from one side of the head portion 521 so as to protrude inward. As described above, the cam member 520 is provided with a locking protrusion 5211 to rotate together when the control lever 510 is rotated. The locking protrusion 5211 may be provided on an outer circumferential surface of the head portion 521.

The connecting rod 720 of the check valve unit has one end coupled to the end of the protrusion 522 and the other end coupled to the check valve 710 so that the check valve 710 moves linearly together with the cam member 520 .

In the air cylinder breathing state, the protruding portion 522 protrudes a predetermined distance toward the inside of the connector cover, and the check valve 710 connected to the protruding portion 522 may be disposed to block the exhalation passage hole 110. At this time, the second elastic spring 730 may be interposed between the inner wall of the connector cover 300 and the check valve 710 to bring the check valve 710 into close contact with the exhalation passage hole 110 . In addition, a guide hole 111 for guiding linear movement of the check valve 710 into which the connection rod 720 is inserted may be provided at the center of the exhalation passage hole.

Hereinafter, with reference to FIG. 5 , an external breathing state in which the exhalation passage hole 110 is opened in the ventilation device and the air flows in the exhalation passage in both directions will be described in more detail.

When the control lever 510 is rotated at a predetermined angle in the air cylinder breathing state, the cam member 520 rotates together with the control lever 510 by the locking protrusion 5211, and the cam member 520 rotates and At the same time, it moves in a straight line for a predetermined distance in one direction. At this time, the linear movement of the cam member 520 is in a direction away from the exhalation passage hole 110, and the linear movement of the cam member 520 may be made inside the control lever 510.

When the cam member 520 moves in a direction away from the exhalation passage hole 110, the check valve 710 connected to the protrusion 522 also moves away from the exhalation passage hole 110 together, and the check valve 710 moves away from the exhalation passage hole 110. It is arranged spaced apart from (110). And as the exhalation passage hole 110 is opened, the exhalation passage is also opened so that the air flow in the exhalation passage is made in both directions. Thus, the wearer is in a state of being able to breathe through the outside air.

As such, the present invention allows the air flow of the exhalation passage through which the exhalation of the mask wearer is discharged to the outside is selectively made in both directions, so that the wearer can inhale external air even while wearing the mask according to the choice of the wearer, Air consumption can be minimized, and through this, firefighting and lifesaving work hours can be extended inside the fire site.

Of course, in this state, when the control lever 510 is rotated at a predetermined angle in the opposite direction, the check valve 710 is again arranged to block the exhalation passage hole 110, and the air flow in the exhalation passage is made in one direction. becomes

6 is a view showing an inner circumferential surface of a coupling part of a connector cover in a ventilation device according to an embodiment of the present invention, and FIG. 7 is a view showing an outer surface of a head portion of a cap member in a ventilation device according to an embodiment of the present invention. Figures 8 (a) and (b) are views conceptually illustrating the structure of a cam of a ventilation device according to an embodiment of the present invention.

Hereinafter, the cam structure of the ventilation device according to the present embodiment will be described with reference to FIGS. 6 to 8 .

As described above, the coupling part 310 may protrude in a pipe shape.

As shown in FIG. 6 , a first cam embossed 311 and a first cam indented 312 having a right triangle shape may be formed along an inner circumferential surface of the coupling part 310 . Here, the first cam embossed 311 and the first cam intaglio 312 have a structure corresponding to each other, and when the first cam embossed 311 is formed on the inner circumferential surface of the coupling part 310, the first cam is naturally formed without a separate process. The intaglio 312 is formed, and conversely, when the first cam intaglio is formed, the first cam embossment 311 is naturally formed without a separate process.

As shown in FIG. 7 , the head portion 521 may have a second cam embossed 5212 and a second cam intaglio 5213 formed along an outer circumferential surface of a right triangle shape. Here, the second cam embossed 5212 and the second cam intaglio 5213 correspond to each other, and when the second cam embossed 5212 is formed on the outer circumferential surface of the head portion 521, the second cam is naturally formed without a separate process. The intaglio 5213 is formed, and conversely, when the second cam intaglio is formed, the second cam embossment 5212 is naturally formed without a separate process.

The first cam embossed 311 is formed to correspond to the second cam intaglio 5213, and in a state where the cam member 520 is inserted into the coupling part 310, the first cam embossed 311 is the second cam intaglio ( 5213) can be overlapped and combined. In addition, the second cam embossed 5212 is formed to correspond to the first cam intaglio 312, and the second cam embossed 5212 is formed to correspond to the first cam in a state in which the cam member 520 is inserted into the coupling part 310. It can overlap and combine with the intaglio 312. The combination of the first cam relief 311 and the second cam intaglio 5213 and the coupling of the second cam relief 5212 and the first cam intaglio 312 form a cam structure with each other.

The first cam embossed 311, the second cam intaglio 5213, and the second cam embossed 5212 and the first cam intaglio 312 are coupled to the hypotenuse of the first cam embossed 311 and the second cam embossed The hypotenuses of (5212) are facing each other. When the cam member 520 rotates in this state, the second cam relief 5212 is guided by the oblique side of the first cam relief and moves linearly.

However, as described above, since the first elastic spring 530 is disposed between the control lever 510 and the cam member 520, the elastic restoring force of the first elastic spring 530 acts on the cam member 520 to act on the cam member. 520 may be pressed toward the inside of the connector cover.

Accordingly, when the cam member 520 is not in a state where the cam member 520 has moved to the inside of the connecting body cover as much as possible, the cam member 520 is moved in the connecting body cover 300 inward by the pressure of the first elastic spring 530. And, the linear motion is converted into rotational motion by the cam structure, so that the connector cover 300 is completely rotated to one side. Because of this, even if the wearer does not fully operate the control lever 510 in the air cylinder breathing state, the check valve 710 naturally comes into the air cylinder breathing state in close contact with the exhalation passage hole 110, so that the wearer can operate the air cylinder breathing state. It is possible to prevent external air from flowing into the inner space of the mask body 1 through the exhalation passage.

However, in this way, when the first elastic spring 530 is automatically operated in an air cylinder breathing state by pressing, when the wearer rotates the operating lever 510 a predetermined distance to switch to an external breathing state, the rotation angle is changed. A means of maintenance is required.

To this end, a locking groove 5212a may be formed at the apex of the second cam relief 5212 . Therefore, as shown in (a) of FIG. 8, when the wearer rotates the control lever 510 at a fixed distance to switch to an external breathing state, the apex of the first cam relief 311 is the second cam relief. The angle of rotation of the control lever 510 may be maintained by being caught in the locking groove 5212a.

And when the control lever 510 is rotated to one side to return to the air breathing state from the external breathing state, the wearer moves the control lever 510 so that the apex of the first cam relief 311 is the engaging groove of the second cam relief. 5212a, if the rotation is manipulated only at an angle enough to deviate from (b) of FIG. 8, the pressure of the first elastic spring 530 can automatically bring the air into a breathing state.

The above description is merely an example of the technical idea of the present invention, and those skilled in the art will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims

In an air respirator mask, a ventilation device that is mounted on a mask body worn on a user's face and connected to an air chamber to provide an inhalation passage between the inner space of the mask body and the air chamber and an exhalation passage between the inner space and the outside,

a valve connecting body mounted on the mask body from inside the mask body;

a connection body cover coupled to the valve connection body outside the mask body; and

Ventilation device for an air respirator mask, characterized in that it comprises a manual opening and closing valve disposed on the connecting body cover and rotated so that the air flow in the exhalation flow path is made in both directions.
The method of claim 1, wherein the aeration device

Further comprising a check valve unit having a check valve for passing the air flow in a direction going out from the exhalation passage and blocking the air flow in a direction flowing into the inner space,

The valve connecting body includes an exhalation passage hole forming a partial section of the exhalation passage, and the check valve part is connected to the manual opening/closing valve and is arranged to block the exhalation passage hole according to a rotational operation of the manual opening/closing valve. Or a ventilation device for an air respirator mask, characterized in that disposed spaced apart from the exhalation passage hole so that the exhalation passage is open.
According to claim 2,

Through a cam structure that converts rotational motion into linear motion, when the manual on-off valve is rotated, the check valve is linearly moved in a direction approaching the exhalation passage hole or in a direction away from the exhalation passage hole Air, characterized in that Ventilation device for respirator mask.
The method of claim 3, wherein the manual on-off valve

an operating lever rotatably coupled to a coupling portion formed on the coupling body cover at a predetermined angle;

A head portion coupled to the coupling portion together with the control lever, and a protrusion extending a predetermined length from one side of the head portion such that the head portion passes through the coupling portion and protrudes toward the inside of the connector cover when the head portion is coupled to the coupling portion. And a cam member that rotates together when the control lever rotates,

The cam member adjusts the protrusion distance of the protruding portion by rotation in a state in which the cam member is coupled to the engaging portion,

The check valve unit is coupled to the check valve and is provided with a connecting rod having a predetermined length connected to the end of the protrusion, so that when the protrusion protrudes a predetermined distance, the check valve is disposed to block the exhalation passage hole. Ventilation device for respirator masks.
According to claim 4,

The coupling part protrudes in a pipe shape so that the cam member is inserted and coupled to the inside,

The combined coupling portion and the cam member are inserted and coupled so as to cover the operating lever,

The head portion is a ventilation device for an air respirator mask, characterized in that the locking protrusion is provided so as to be caught on the inner surface of the operating coupling body cover and rotated together in a state in which the operating lever and the cam member are coupled to the coupling portion.
According to claim 5,

A first cam embossed and a first cam indented in a triangular shape are formed along the inner circumferential surface of the coupling part,

A second cam relief corresponding to the first cam relief and a second cam relief corresponding to the first cam relief are formed along an outer circumferential surface of the head,

Ventilation device for an air respirator mask, characterized in that the first cam relief and the second cam relief are combined, and the first cam relief and the second cam relief are combined to form the cam structure.
The method of claim 6, wherein the manual on-off valve

Further comprising a first elastic spring disposed between the operating lever and the cam member to press the cam member toward the inside of the connecting body cover,

The operating lever is a ventilation device for an air respirator mask, characterized in that the rotational force is applied in one direction by the pressing of the first elastic spring and the cam structure.
According to claim 7,

A locking groove is formed at the apex of the first cam embossed or the second cam embossed,

When the control lever is rotated a predetermined distance in the other direction, the apex of the first cam relief is caught in the locking groove of the second cam relief, or the apex of the second cam relief is caught in the locking groove of the first cam relief. Ventilation device for an air respirator mask, characterized in that the rotational operating angle is maintained.
According to claim 5,

The connection body cover has a supply valve connection part protruding around one side of the coupling part so that the supply valve is coupled to be connected to the air box,

The manual opening and closing valve further includes a coupling pin inserted into the operating lever and caught on the coupling portion so that the coupling state of the operating lever and the cam member is maintained,

Ventilation device for an air respirator mask, characterized in that in a state in which the control lever is rotated so that the check valve blocks the exhalation passage hole, the direction of departure of the coupling pin inserted into the control lever is toward the supply valve connection part .