Respiratory mask device for harmful gas removing air for harmful gas such as carbon dioxide

Abstract

To provide a respiratory mask device for harmful gas removing air for a harmful gas such as a carbon dioxide gas that is generated under a closed space environment such as when going aboard a vessel, a construction site and subsurface construction sites.SOLUTION: There is provided a respiratory mask device for harmful gas removing air for harmful gas such as carbon dioxide. Right and left side faces in the lower half of a respiratory mask face are attached to right and left base parts of right and left front side support rod parts and right and left rear side support rod parts of right and left V-shaped support rod parts of a balance shape-retaining plate respectively, and the right and left base parts are supported by a connection plate part or an equivalent member in an integrated manner. Lower end parts of right and left front side elastic suspension bands, and right and left rear side elastic suspension bands disposed on right and left side faces of a cap type support band that a wearer puts on separately in the front and back are detachably connected to right and left tip parts of the right and left V-shaped support rod parts respectively. The respiratory mask device is worn after adjusting each length of the elastic suspension bands, and adjusting the face worn pressure of the respiratory mask face.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a respiratory mask device for harmful gas-removing air used for work or survival in an environment of harmful gases such as carbon dioxide gas.

Background Art

[0002] The present invention has been made for the purpose of providing a respiratory mask device for removing harmful gases such as carbon dioxide gas generated in a closed space environment such as a ship, a building, or an underground construction site.

[0003] Since the respiratory mask device for removing harmful gases such as carbon dioxide gas for the above purpose is used in an emergency occurring in a closed space environment, it is required to have the following performance. 1) For a healthy adult, it should fit regardless of gender, size of the head and face, etc. 2) It should be possible to use it continuously for a long time. 3) For this purpose, the body part required for support is the head and body part composed of the skeleton, and the muscle part is not used. The reason is that long-term use causes an excessive burden on the muscle part and causes pain to the user. 4) It should be possible to adjust the strength of the contact with the face. 5) It should be possible to individually adjust the contact of the nose and jaw. 6) It should be possible to individually adjust the horizontal width and vertical width of the contact surface of the mask with the face. 7) When talking with the mask on, the skin in the mouth should not be bitten. 8) Glasses should be usable when wearing the mask. 9) Even a person who is using it for the first time should be able to put on the mask on the face in a short time (for example, within 10 seconds). 10) There are provided marks for distinguishing the front, back, left, and right of the hat-shaped support band supporting the mask, and a flap that serves as a guide for guiding the correct wearing direction when putting on the hat. 11) The mask worn on the body should be easily removable. 12) The state after removing the mask should return to the state before wearing. 13) The consumable can be easily replaced.

[0004] A) Regarding the removal of the rubber tape 13) Pull out the core metal of the knob-cum-stopper at the proximal end of the rubber tape, and pull out the rubber tape from the square ring. 14) For the hook part on the opposite side, insert a metal plate such as a coin into the gap between the hooks and pry it to remove it. B) Regarding the attachment of the rubber tape 15) After connecting the hooks, pass the rubber tape through the square ring, insert the stopper pin of the knob-cum-stopper to complete. 16) Since the rubber tapes for the nose side and the jaw side have different lengths, be careful when attaching them. C) Regarding the intake and exhaust rubber valves 17) The same intake rubber valve and exhaust rubber valve are used. D) Regarding the removal of the intake and exhaust rubber valves 18) For the intake rubber valve, pinch and pull out the protruding part inside it with your fingertips. 19) For the exhaust rubber valve, use a thin rod such as a toothpick, roll up a part of the exhaust rubber valve and pinch it with your fingertips, then pull out the exhaust rubber valve. E) Regarding the attachment of the intake and exhaust rubber valves 20) For both the intake, supply, and exhaust rubber valves, insert the head (the non-pointed side) of a thin rod such as a toothpick into the hole at the center of the valve and push it in to complete. F) Regarding the shape of the intake and exhaust rubber valves 21) The protruding ring part formed at the central part of the shaft part of the intake and exhaust rubber valve fits and is attached to the annular recess formed on the inner diameter surface of the mounting hole of the respiratory mask body.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention provides a breathing mask device for purified air by a harmful gas removal device such as carbon dioxide gas generated in a closed space environment such as a ship, a building, or an underground construction site.

[0007] In the Japanese Unexamined Patent Application Publication No. 2020-59953 of Patent Document 1, in the <First Embodiment> of paragraph

[0011] , it is disclosed that "Referring to FIGS. 1 to 4, the disposable mask 10 has a vertical direction V, a horizontal direction X, and a front-rear direction Z, and a mask body 11 having a cup-shaped covering portion (filter portion) 20 and a face contact body 30 joined to the peripheral portion of the covering portion 20, and a pair of tightening strings 12 extending from both side edges of the mask body 11. The mask body 11 further has a longitudinal center line P that bisects the dimension in the horizontal direction X and a transverse center line Q that bisects the dimension in the vertical direction V." Further, in paragraph

[0015] , it is disclosed that "The tightening string 12 is connected to the mask body 11 via a plastic locking tool 13 fixed by a seal line 15 in a state of being interposed between the covering portion 20 and the face contact body 30."

[0008] The Japanese Unexamined Patent Application Publication No. 2017-51675 of Patent Document 2 discloses that "[Problem] To provide a mask assembly having a headgear assembly that provides greater comfort to a patient without sacrificing functionality." 「[Solution means] A headgear assembly for stabilizing and positioning a respiratory mask assembly on a patient's head. The headgear assembly includes a pair of upper side straps and a pair of lower side straps, an upper strap connecting the pair of upper side straps, a lower strap connecting the pair of lower side straps, a crossbar strap between the upper strap and the lower strap, a pair of upper intermediate straps, each upper intermediate strap connecting the corresponding one of the pair of upper side straps to the crossbar strap, and a pair of lower intermediate straps, each lower intermediate strap connecting the crossbar strap to the lower strap.」 is disclosed.

[0009] In Japanese Patent Application Laid-Open No. 2007-68710 of Patent Document 3, in paragraph

[0017] , it is disclosed that "FIGS. 1 and 2 are a perspective view and a side view when the mask 1 according to the present invention is in a worn state. In FIG. 1, the face 2 and the head 3 of the wearer are shown by solid lines, and in FIG. 2, these are shown by virtual lines. The mask 1 has a full-face type face body 11, a water storage bag 12, and a plurality of headbands 13 connecting the face body 11 and the water storage bag 12." In paragraph

[0021] , it is disclosed that "The headband 13 has a base end portion 31 forming its rear portion fixed to the water storage bag 12, and the length can be adjusted by a buckle 33 attached to a front end portion 32 which is the opposite end portion of the base end portion 31. A latching member 34 is attached to the buckle 33, and the latching member 34 is removably hooked on a receiving projection 36 on the face body 11. In the illustrated example, only the headband 13a attached to the top edge portion 25 is made non-adjustable in length (see FIG. 4), but this headband 13a can also be replaced with one having an adjustable length."

[0010] In Patent Document 1, as described above, in paragraph

[0011] In paragraph

[0015] , as disclosed, there are four attachment connection points for the mask body, namely two upper and lower points on the left and right peripheries. Therefore, when the tightening string 12 is hung on the ears and contacts the face, if the size of the mask body is large, problems will occur with the airtightness of the left and right side edges of the mask body. Thus, the mask body 11 needs to be sized to fit the wearer's face.

[0011] In Patent Document 2, in the embodiment of FIG. 1, a respiratory mask assembly 10 is shown, which comprises a frame 12 and a cushion 14. The cushion 14 can be permanently or removably attached to the frame 12. A headgear assembly 16 is removably attached to the frame 12 and is configured to hold the frame 12 and the cushion 14 in a desired adjusted position on the patient's face.

[0012] In Patent Document 3, the connection of the mask body 11 and the water storage bag 12 by the disclosed headband 13 to the wearer's face 2 and head 3 is achieved by adjusting the length with a buckle 33 attached to the front end 32 of the headband 13. A latching member 34 is attached to the buckle 33, and the latching member 34 is removably hooked to a receiving protrusion 36 on the mask body 11 for attachment. Although it is provided to be easily removable, since it is a mask body for heavy labor work considering moisture supply, it cannot be worn loosely.

[0013] Generally, masks come in different sizes for adult men and women's faces, so large, medium, and small sizes are set, and it is common to select from them. The present invention aims to develop a size - free respiratory mask that can be applied to the wearer in one size, excluding extremely large or small sizes.

[0014] The present invention provides a respiratory mask device for removing harmful gases such as carbon dioxide gas in the air for breathing, which achieves the above - mentioned functions on the premise of using a known respiratory mask.

Means for Solving the Problems

[0015] The left and right base portions of the left and right front strut portions and the left and right rear strut portions of the left and right V-shaped strut portions are connected by a connecting plate portion to provide a left and right integrated balance maintaining plate. The balance maintaining plate is curved and attached to the outer surface of the lower half of the respiratory mask body. At the same time, the left and right base portions are respectively attached to the outer surfaces of the attachment portions on the left and right side surfaces of the lower half of the respiratory mask body on the outer surfaces of the attachment portions on the left and right side surfaces of the balance maintaining plate, so that the balance maintaining plate and the respiratory mask body are integrally formed. And the connecting plate portion of the balance maintaining plate is supported at a fixed position on the outer surface of the respiratory mask body by a support plate supported by the respiratory mask body. At the tip ends of the left and right front strut portions and the tip ends of the left and right rear strut portions of the left and right V-shaped strut portions of the balance maintaining plate, the lower end portions of the left and right front elastic suspension bands arranged at intervals in the front and rear directions on the left and right side surfaces of the hat-shaped support band worn by the wearer are detachably connected to the lower end portions of the left and right rear elastic suspension bands respectively. By adjusting the lengths of the left front elastic suspension band, the left rear elastic suspension band, the right front elastic suspension band, and the right rear elastic suspension band respectively, the facial wearing pressure and the wearing position of the respiratory mask body are adjusted for wearing, which is in a respiratory mask device for removing harmful gases such as carbon dioxide gas from the air for breathing.

[0016] The left and right base portions of the left and right front strut portions and the left and right rear strut portions of the left and right V-shaped strut portions are connected by a connecting plate portion to provide a left and right integrated balance maintaining plate. The balance maintaining plate is curved and attached to the outer surface of the lower half of the respiratory mask body. At the same time, the left and right base portions are respectively attached to the outer surfaces of the attachment portions on the left and right side surfaces of the lower half of the respiratory mask body on the outer surfaces of the attachment portions on the left and right side surfaces of the balance maintaining plate, so that the balance maintaining plate and the respiratory mask body are integrally formed. And the connecting plate portion of the balance maintaining plate is engaged with a rigid portion formed on the outer surface of the respiratory mask body and supported at a fixed position on the outer surface of the respiratory mask body. At the tip ends of the left and right front strut portions and the tip ends of the left and right rear strut portions of the left and right V-shaped strut portions of the balance maintaining plate, the lower ends of the left and right front elastic suspension bands and the left and right rear elastic suspension bands that are arranged at intervals in the front and rear on the left and right side surfaces of the hat-shaped support band worn by the wearer are respectively detachably connected. By adjusting the lengths of the left front elastic suspension band, the left rear elastic suspension band, the right front elastic suspension band and the right rear elastic suspension band respectively, the facial wearing pressure and the wearing position of the respiratory mask body are adjusted for wearing, which is in a respiratory mask device for removing harmful gases such as carbon dioxide gas from the air for breathing.

[0017] The attachment of the attachment portions on the left and right side surfaces of the lower half of the respiratory mask body and the left and right base portions of the left and right front strut portions and the left and right rear strut portions of the balance maintaining plate is such that the left and right adjustment knobs are attached by attachment means. One of the left and right adjustment knobs is supported by one hand of the wearer, or the other of the left and right adjustment knobs is supported by the other hand of the wearer. By adjusting the lengths of the left front elastic suspension band, the left rear elastic suspension band, the right front elastic suspension band or the right rear elastic suspension band released from the tip ends of the left and right front strut portions and the left and right rear strut portions of the left and right V-shaped strut portions, the facial wearing pressure of the respiratory mask body is adjusted for wearing on the face of the wearer, which is in a respiratory mask device for removing harmful gases such as carbon dioxide gas from the air for breathing.

[0018] The left and right base mounting holes of the left and right V-shaped support rod parts are made to correspond to the left and right mounting holes opened in the mounting parts on the left and right side surfaces of the lower half of the respiratory mask body. The screw rods of the screws with heads are respectively inserted outward from the inner side of the respiratory mask body through the left and right mounting holes and the outer sides of the left and right base mounting holes. Mounting nuts are screwed onto the tip ends of the respective screw rods to fasten the respiratory mask body. At the same time, the tip ends of the screw rods are inserted through the left and right base mounting holes of the left and right V-shaped support rod parts and protrude further outward. Left and right adjustment knobs with a shape in which the outer periphery of the end part has a flange-like diameter expansion are screwed and fastened to the protruding screw rods, and the left and right adjustment knobs are integrally mounted and provided on the left and right outer side surfaces of the respiratory mask body in a carbon dioxide gas and other harmful gas removal air respiratory mask device.

[0019] The hat-shaped support band is provided at least with a left-side band body in which the front half on the left side and the rear half on the right side are passed through the center of the top part to the annular base end band, a right-side band body in which the front half on the right side and the rear half on the left side are passed through the center of the top part to the base end band, and left and right intermediate band bodies in which the middle part on the left side and the middle part on the right side are passed through the center of the top part to the base end band. One edge of the base end band is bent and sewn into a tubular shape and fitted and connected to one vertical rod part of the frame-shaped connecting ring. On the outer surface of the other edge side of the base end band, male and female parts of a velvet fastener are provided with a required length, and a finger hook ring is connected to the other edge. After the finger hook ring is inserted through the other vertical rod part of the frame-shaped connecting ring from the inner side to the outer side and pulled out, it is bent at the other vertical rod part of the frame-shaped connecting ring and reversed to the other side, and the male and female parts of the velvet fastener facing each other are joined in contact, and it is provided in a carbon dioxide gas and other harmful gas removal air respiratory mask device that can be adjusted to be loosely or tightly worn according to the circumferential length around the wearer's head.

[0020] On the outer surface of the lower end of the left middle part of the left - right middle belt body of the hat - shaped support belt, a left front - side hat - band hanging belt with a left front - side connecting ring provided at the lower end is provided, and on the outer surface of the lower end of the right middle part, a right front - side hat - band hanging belt with a right front - side connecting ring provided at the lower end is respectively provided. On the outer surface of the lower end of the left rear half of the right belt body of the hat - shaped support belt, a left rear - side hat - band hanging belt with a left rear - side connecting ring provided at the lower end is provided, and on the outer surface of the lower end of the right rear half of the left belt body of the hat - shaped support belt, a right rear - side hat - band hanging belt with a right rear - side connecting ring provided at the lower end is respectively provided in the respiratory mask device for removing harmful gases such as carbon dioxide gas from the air according to claim 1 or claim 2.

[0021] In a respiratory mask device for removing harmful gases such as carbon dioxide gas from the air, the base end of a detachable flap having a double - folded annular finger - hanging part facing downward is attached to the left - right center of the outer surface of the back part of the base - end band of the hat - shaped support belt.

Advantages of the Invention

[0022] The present invention can provide a respiratory mask body of a system with less compressive fatigue burden due to wearing for mask wearers engaged in an environment of harmful gases such as carbon dioxide gas.

[0023] Since the respiratory mask body of the present invention uses a hat - shaped support belt that utilizes the head with less fatigue due to wearing, in terms of time, it can be worn for a long time, that is, continuously for several days, both during waking activities and during sleep. The compressive fatigue is reduced, and continuous wearing for several days can be maintained.

[0024] Since the attachment of the respiratory mask body, whose support surface contacts the mouth area of the wearer's face, is performed at two locations that are in the middle up - down and separated left - right, the contact pressure of the surrounding contact part on the back of the mask is averaged to be at almost the same pressure, which can be made weak or strong. That is, during labor such as construction and work, the band is tightened and strongly compressed to prevent leakage of supply and exhaust air and the detachment of the respiratory mask body. During rest or sleep, the band is loosened to greatly reduce compressive fatigue.

[0025] When moving the mouth for conversation, if the contact pressure of the breathing mask is strong, the movement of the mouth is inhibited, but if the contact pressure is weak, the obstruction is reduced.

[0026] The band for fixing the conventional mask to the face is connected by providing connecting parts at two upper and lower positions on the left and right sides of the mask side, that is, at four positions. Therefore, the contact surface part on the back of the mask becomes large and wide so as to wrap around the face from both sides. As a result, it is not only difficult to move the mouth and impossible to have a conversation, but also an injury accident of biting the tongue occurs during the conversation.

[0027] In the present invention, the balance maintaining plate is formed with left and right V-shaped support rod portions branching in a V-shape from the mask attachment portion. At the tip ends of the left and right V-shaped support rod portions, the lower ends of the left and right front elastic hanging bands and the lower ends of the left and right rear elastic hanging bands of the hat-shaped support band are detachably connected. Therefore, the tip ends of the left and right V-shaped support rod portions are separated outward and opposed to the left and right sides of the face, and the contact pressure of the breathing mask on the face is buffered by the spring action of the balance maintaining plate and the tension of the left and right front elastic hanging bands and the left and right rear elastic hanging bands and dispersed to the whole mask. And since the traction direction is specified, even if the contact pressure is weakened, the breathing mask will not be displaced relative to the face.

[0028] Since the left adjustment gripper and the right adjustment gripper are attached and arranged at the left and right bases of the left and right V-shaped support rod portions of the balance maintaining plate on the left and right side surfaces of the lower half of the breathing mask body, the left adjustment gripper or the right adjustment gripper is supported by one hand of the wearer, and with the other hand, the lengths of the left front elastic hanging band, the left rear elastic hanging band, the right front elastic hanging band or the right rear elastic hanging band removed from the tip ends of the left and right V-shaped support rod portions are fixedly adjusted in millimeters to adjust the face mounting pressure of the breathing mask body and can be worn on the face of the wearer.

[0029] At the tip portions of one of the left front side strut portion and the left rear side strut portion of the left and right V-shaped strut portions, the lower end portions of the left front side elastic suspension band and the left rear side elastic suspension band arranged before and after on the left side surface of one of the hat-shaped support bands are connected, and at the tip portions of the other right front side strut portion and the right rear side strut portion of the left and right V-shaped strut portions, the lower end portions of the right front side elastic suspension band and the right rear side elastic suspension band arranged before and after on the right side surface of the other of the hat-shaped support bands are connected and respectively attached. The left and right base portions of the left and right V-shaped strut portions are connected by a connecting plate portion so that the left and right V-shaped strut portions are integrally provided, and the left and right base portions of the left and right V-shaped strut portions correspond to the outer surface of the lower half of the respiratory mask body, and the left and right base attachment holes of the left and right base portions communicate with the attachment holes opened on the left and right of the lower half of the respiratory mask body and are integrally attached by attachment means inserted therethrough. Therefore, the left and right tip portions of the left and right V-shaped strut portions are spaced apart outwardly from each other on the left and right of the face to oppose each other, buffer the contact surface pressure of the respiratory mask on the face by a spring as described above, and disperse from the left and right base portions to the whole mask. Since the pressurizing direction is applied in a predetermined direction, even if the contact surface pressure is weakened, the respiratory mask does not shift in position with respect to the face.

[0030] The middle connecting plate portion of the balance maintaining and shaping plate is placed at a predetermined position of the respiratory mask body because the opposing front edge thereof is connected and mounted from above to the protruding support portion of the support plate attached to the respiratory mask body.

[0031] The connecting plate portion may be supported at the position of the respiratory mask body by connecting and mounting the opposing front edge thereof from above to the rigid body portion formed on the respiratory mask body.

Brief Description of the Drawings

[0032]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Modes for Carrying Out the Invention

[0033] Hereinafter, the breathing mask device for removing harmful gases (clean air) of the present invention will be described based on the drawings of FIGS. 1 to 13 showing embodiments. The breathing mask device 1 for removing harmful gases (clean air) of the present invention includes a breathing mask body 2, a hat-shaped support band 3, a left front elastic hanging band and a left rear elastic hanging band 5a arranged before and after the left side of the hat-shaped support band 3, a right front elastic hanging band 4b and a right rear elastic hanging band 5b arranged before and after the right side of the hat-shaped support band 3, and an air supply pipe 8 of a harmful gas removal device 7 (not shown) connected to an intake pipe 6 arranged on the front surface of the lower half 2b of the breathing mask body 2.

[0034] As shown in FIG. 6, the breathing mask body 2 is formed in a planar conforming portion 9 bent left and right along C-C of a center line extending vertically at the center of the left and right, and intake holes 10 facing the wearer's mouth are formed in the lower half 2b of this portion, and exhalation holes 11 facing the wearer's nose are formed in the upper half 2a. An intake valve mechanism 12 is provided in the intake holes 10, and an exhaust valve mechanism 13 is provided in the exhalation holes 11, respectively.

[0035] As shown in FIG. 6, the back surface of the breathing mask body 2 is formed such that the transverse shape is rounded from the outer peripheral edge 14a to the inner peripheral edge 14b inside, and the contact surface portion 15 with the wearer is configured in a ring shape. The contact surface portion 15 contacts the face to form a closed space 16 with the wearer's nose and mouth on the inside.

[0036] The left lower end connecting portion 4a21 of the left front elastic suspension band 4a disposed on the front side of the left side surface of the hat-shaped support band 3 is connected to the left front tip portion 17a11 of one of the left front support rod portions 17a1 of the left V-shaped support rod portion 17a, and the left lower end connecting portion 5a21 of the left rear elastic suspension band 5a disposed on the rear side of the left side surface of the hat-shaped support band 3 is connected to the left rear tip portion 17a21 of the other left rear support rod portion 17a2. Similarly, the right lower end connecting portion 4b21 of the right front elastic suspension band 4b disposed on the front side of the right side surface of the hat-shaped support band 3 is connected to the right front tip portion 17b11 of one of the right front support rod portions 17b1 of the right V-shaped support rod portion 17b, and the right lower end connecting portion 5b21 of the right rear elastic suspension band 5b disposed on the rear side of the right side surface of the hat-shaped support band 3 is connected to the right rear tip portion 17b21 of the other right rear support rod portion 17b2.

[0037] One of the left front support rod portions 17a1 of the left V-shaped support rod portion 17a, the left front tip portion 17a11 thereof, the left base portion 17a3 of the other left rear support rod portion 17a2, one of the right front support rod portions 17b1 of the right V-shaped support rod portion 17b, and the right base portion 17b3 of the other right rear support rod portion 17b2 are connected by a connecting plate portion 17c.

[0038] The left base mounting hole 17a31 of the left base portion 17a3 of the other left rear support rod portion 17a2 corresponding to the left front tip portion 17a11 of one of the left front support rod portions 17a1 of the left V-shaped support rod portion 17a is aligned with the left mounting hole 18a opened on the left side surface of the lower half portion 2b of the respiratory mask body 2. Then, as shown in FIG. 8, the screw rod 39a of the screw 39 with a head is inserted from the inside to the outside of the respiratory mask body 2 through the corresponding left base mounting hole 17a31 and the left mounting hole 18a. The screw hole 40a of the mounting nut 40 is screwed onto the screw rod 39a to fasten the respiratory mask body 2. At the same time, the tip portion of the screw rod 39a is inserted through the left base mounting hole 17a31 of the left base portion 17a3 of the V-shaped support rod portion 17a and further protrudes outward. A left adjustment knob 21a having a shape in which the outer periphery of the outer end is expanded in a flange shape is screwed and fastened to the protruding screw rod 39a and integrally provided.

[0039] The right adjustment knob 21b is provided integrally with the same structure as the left adjustment knob 21a, corresponding to one right front strut portion 17b1 of the right V-shaped strut portion 17b, the right base portion 17b3 of the other right rear strut portion 17b2, and the right mounting hole 18b that opens on the right side surface of the lower half portion 2b of the respiratory mask body 2.

[0040] A left front male hook button 22a1 is provided on the inner surface side of one left front tip portion 17a11 of the left V-shaped strut portion 17a, and a left rear male hook button 23a1 is provided on the inner surface side of the other left rear tip portion 17a21. Similarly, a right front male hook button 22b1 is provided on the inner surface side of one right front tip portion 17b11 of the right V-shaped strut portion 17b, and a right rear male hook button 23b1 is provided on the inner surface side of the other right rear tip portion 17b21.

[0041] The connecting plate portion 17c is stretched so as to face the outer surface of the lower half portion 2b of the respiratory mask body 2, and the opposing front edge 17c1 is connected and mounted from above to the protruding support portion 20 of the support plate 19 attached to the respiratory mask body 2 to dispose the respiratory mask body 2 at a predetermined position.

[0042] The hat-shaped support band 3 is provided from a left side band 3a in which a left front half portion 3a1 and a right rear half portion 3a2 are passed through the center of the top portion to the annular base end band 24, a right side band 3b in which a right front half portion 3b1 and a left rear half portion 3b2 are passed through the center of the top portion to the base end band 24, and left and right intermediate bands 3c in which a left intermediate portion 3c1 and a right intermediate portion 3c2 are passed through the center of the top portion to the base end band 24.

[0043] One edge 24a of the proximal band 24 is bent and sewn in a tubular shape and fitted and connected to one vertical rod portion 25a of the frame-shaped connecting ring 25. On the outer surface of the other edge 24b side of the proximal band 24, a male portion 26a and a female portion 26b of a velcro fastener 26 are provided with a required length. After inserting and pulling out the other edge 24b into the other vertical rod portion 25b of the frame-shaped connecting ring 25 from the inner side to the outer side, a finger hook ring 24b1 is connected to the edge. With this finger hook ring 24b1, the other edge 24b side of the proximal band 24 is bent by the other vertical rod portion 25b of the frame-shaped connecting ring 25 and reversed to the other side, and the male portion 26a and the female portion 26b of the velcro fastener 26 facing each other are joined in contact, and the length around the outer periphery of the wearer's head is adjusted so that it can be worn loosely or tightly.

[0044] On the outer surface of the lower left end of the left and right intermediate strip 3c of the hat-shaped support band 3, a left front hat band hanging band 27a with a left front connecting ring 28a provided at the lower end 27a1, and on the outer surface of the lower right end of the right lower end of the left intermediate portion 3c1, a right front hat band hanging band 27b with a right front connecting ring 28b provided at the lower end 27b1 are respectively provided.

[0045] Behind the proximal band 24 to which the lower end 3b21 of the left rear half 3b2 of the left side strip 3b of the hat-shaped support band 3 is connected, a left rear hat band hanging band 29a with a left rear connecting ring 30a provided at the lower end 29a1, and behind the proximal band 24 to which the lower end of the right rear half 3a2 of the left side strip 3a of the hat-shaped support band 3 is connected, a right rear hat band hanging band 29b with a right rear connecting ring 30b provided at the lower end 29a1 are respectively provided.

[0046] As shown in Fig. 4(A), the left front elastic hanging band 4a is integrally provided with a non-extensible left front lower non-extensible portion 4a2 sewn to the lower half of the left front upper elastic band portion 4a1. The upper end of the left front upper elastic band portion 4a1 is provided at the left front upper tubular portion 4a11. The left front upper tubular portion 4a11 is extended to a large diameter, and the fitting small diameter portion 31a1 of the stopper pin 31a is inserted, and large diameter both ends 31a2 protruding outward are provided at both ends. In addition, in the upper left front elastic band portion 4a1, the male portion 33a1 of the velvet fastener 33a is sewn for a required length starting from directly below the upper left front end tubular portion 4a11. Also, in the non-elastic lower left front non-stretchable portion 4a2 that does not stretch, on the two-fold corresponding surface with the male portion 33a1 of the velvet fastener 33a, and from above the left front female hook button 22a2 provided at the lower left front end connecting portion 4a21, the female portion 33a2 of the velvet fastener 33a of a required length is sewn for a required length. In addition, in the upper left front elastic band portion 4a1, between the male portion 33a1 of the velvet fastener 33a and the female portion 33a2 of the velvet fastener 33a, a left front upper half elastic stretchable portion 4a12 is provided.

[0047] As described above, the left front elastic hanging band 4a is configured. Thus, at the upper left front end tubular portion 4a11 of the upper left front elastic band portion 4a1 of the left front elastic hanging band 4a, with the stud pin 31a removed, it is inserted from the inside into the left front connecting ring 28a of the left front hat band hanging band 27a provided at the lower end of the left middle portion 3c1 of the left and right middle band body 3c of the hat-shaped support band 3 and is hung in a two-fold manner. Then, the stopper pin 31a is provided at the upper left front end tubular portion 4a11. Therefore, the left front elastic hanging band 4a is provided so that the distance between the left front connecting ring 28a and the left front female hook button 22a2 can be adjusted according to the position where the male portion 33a1 and the female portion 33a2 of the velvet fastener 33a are joined by being folded in two around the left front connecting ring 28a.

[0048] Similarly, the right front elastic hanging band 4b, which is the reverse of the left front elastic hanging band 4a, is provided with a similar structure. Therefore, also in this right front elastic hanging band 4b, it is inserted and hung on the right front connecting ring 28b of the right front hat band hanging band 27b, and the length from the right front connecting ring 28b to the right front female hook button 22b2 can be adjusted freely according to the position where the male portion 33b1 and the female portion 33b2 of the velvet fastener 33b are joined by folding in two around the right front connecting ring 28b.

[0049] As shown in Fig. 4(B), the left rear elastic suspension band 5a is provided integrally with a left rear lower non - stretchable part 5a2 that does not extend at the lower part of the left rear upper elastic suspension band part 5a1, similar to the left front elastic suspension band 4a. The upper end of the upper elastic suspension band part 5a1 is provided at a left rear upper end tubular part 5a11. The left rear upper end tubular part 5a11 extends, and the insertion narrow - diameter part 32a1 of the stopper pin 32a is inserted, and thick - diameter both ends 32a2 that protrude outward are provided at both ends. Also, a male part 34a1 of the velcro fastener 34a is provided with a required length starting from directly below the left rear upper end tubular part 5a11 of the left rear upper elastic suspension band part 5a1. Also, in the non - stretchable left rear lower non - stretchable part 5a2, a female part 34a2 of the velcro fastener 34a with a required length is sewn starting from above the left rear female hook button 23a2 provided at the left rear lower end connecting part 5a21, which is a two - fold corresponding surface with the male part 34a1 of the velcro fastener 34a. Therefore, in the left rear upper elastic band part 5a1, between the male part 34a1 of the velcro fastener 34a and the female part 34a2 of the velcro fastener 34a, a left rear upper elastic stretchable part 5a12 is provided. This left rear elastic suspension band 5a is provided so that the length from the left rear connecting ring 30a to the left rear female hook button 23a2 can be adjusted freely according to the position where the male part 34a1 and the female part 34a2 of the velcro fastener 34 are joined by folding the band in two around the left rear connecting ring 30a.

[0050] The right rear elastic suspension band 5b is also provided with a structure that is the reverse of the left rear elastic suspension band 5a. And the right rear elastic suspension band 5b is suspended and arranged in two - fold on the right rear connecting ring 30b at the lower end 29b1 of the right rear cap - band suspension band 29b provided on the rear outer surface of the lower end of the right rear half 3a2 of the left - hand side band 3a of the hat - shaped support band 3, similar to the left rear elastic suspension band 5a. Therefore, the length from the right rear connecting ring 30b to the right rear female hook button 23b2 can be adjusted according to the position where the male part 34b1 and the female part 34b2 of the velcro fastener 34b are joined.

[0051] At the lower left end connecting portion 4a21 of the left front elastic hanging bracket band 4a, as shown in FIG. 9, the left front female hook button 22a2 is attached by inserting the shaft portion 36a of the mounting metal 36 through the reinforcing material 35 from the opposite surface of the attachment surface of the male portion 33a1 and the female portion 33a2 of the velcro fastener 33a of the left front elastic hanging bracket band 4a into the attachment hole 22a21 of the left front female hook button 22a2, and then expanding the diameter and crushing it on the inner surface of the left front female hook button 22a2, and is provided integrally with the left front elastic hanging bracket band 4a.

[0052] The right front female hook button 22b2 provided on the right front elastic hanging bracket band 4b, the left rear male hook button 23a1 provided on the left rear elastic hanging bracket band 5a, and the right rear female hook button 23b2 provided on the right rear elastic hanging bracket band 5b are also provided with the same structure.

[0053] Left mounting holes 18a and right mounting holes 18b are provided on the left and right side surfaces of the lower half 2b of the respiratory mask body 2, and the left base mounting hole 17a31 of the left base 17a3 of the left V-shaped support rod portion 17a and the right base mounting hole 17b31 of the right base 17b3 of the right V-shaped support rod portion 17b correspond to each other.

[0054] The left front male hook button 22a1 has a bottom plate portion 22a11 in contact with the inner surface side of one left front tip portion 17a11 of the left V-shaped support rod portion 17a, and an attachment nut 37 in contact with the opposite outer surface. Then, an attachment screw 38 is inserted through the attachment hole 22a21 from the engagement surface side of the left front male hook button 22a1 and screwed into the screw hole 37a of the attachment nut 37 for deployment.

[0055] As shown in FIG. 10, the left adjustment knob 21a has a recessed portion 42 formed on its outer end surface communicating with a screw hole 41. A locking small-diameter screw 44 is screwed into a small-diameter screw hole 43 opened at the tip end surface of the screw rod 39a of the headed screw 39 screwed into the screw hole 41. The head 44a is accommodated in the recessed portion 42, and the lower surface 44a1 of the head 44a is supported, and the left adjustment knob 21a is integrally attached and locked to the left V-shaped support rod portion 17a and the respiratory mask body 2 for deployment.

[0056] The right adjustment knob 21b also has a similar structure and is attached and locked integrally to the right V-shaped support rod portion 17b and the respiratory mask body 2 and arranged.

[0057] The right front male hook button 22b1 is arranged on the inner surface side of the other right front tip portion 17b11 of the right V-shaped support rod portion 17b, and the right rear male hook button 23b1 is arranged on the inner surface side of the other right rear tip portion 17b21 of the right V-shaped support rod portion 17b, and they are respectively arranged with the same structure as the left rear male hook button 23a1.

[0058] As shown in FIG. 5, the intake valve mechanism 12 equipped in the intake hole 10 of the lower half portion 2b of the respiratory mask body 2 is composed of an intake valve front casing 45a that is inserted into the intake hole 10 of the lower half portion 2b of the respiratory mask body 2 and tightly adheres to the front outer surface around it airtightly, and an intake valve rear casing 45b that tightly adheres to the inner surface around the intake hole 10 of the lower half portion 2b of the respiratory mask body 2 airtightly.

[0059] The intake valve front casing 45a is provided on a tubular body whose rear end face is formed on a connecting surface with a threaded hole 46 opened, and the intake pipe 6 with an air passage 47 opened on its front end face 45a1 projects. The intake pipe 6 is formed with a concave diameter portion 6a in front of the front end, and when the air supply pipe 8 of a harmful gas removal device 7 (not shown) such as carbon dioxide gas is sleeved and connected, it is fastened with a binding band 48 so that the air supply pipe 8 does not fall off from the intake pipe 6.

[0060] The intake valve rear casing 45b is provided with a screwing protrusion 55 having a threaded portion 54 screwed to the intake valve front casing 45a formed on the front surface of the rear end flange portion 53a on its outer periphery, and is provided with a ventilation hole 49 communicating front and rear and an intake valve shaft portion mounting hole 51 for mounting the intake valve 50, and an intake valve seat 52 connecting the intake valve 50 is provided on the rear surface 53b of the rear end flange portion. The screwing protrusion 55 is inserted into the intake hole 10 of the respiratory mask body 2 and screwed into the threaded hole 46 opened on the rear end face 45a2 of the intake valve front casing 45a, and tightly adheres to the periphery of the intake hole 10 of the respiratory mask body 2 airtightly from the front and rear and is integrally connected.

[0061] The exhalation valve mechanism 13 installed in the exhalation holes 11 of the upper half 2a of the respiratory mask body 2 is, as shown in Fig. 5, composed of an exhalation valve front casing 56a that is airtightly fastened to the outer surface of the upper half 2a of the respiratory mask body 2, and an exhalation valve 59 and an exhalation valve seat 60 that are inserted into the exhalation holes 11 of the upper half 2a of the respiratory mask body 2, have a ventilation hole 57 and an exhalation valve shaft portion mounting hole 58 leading to the exhalation valve front casing 56a, and block exhaust during inhalation. The exhalation valve rear casing 56b is provided with a screw engagement portion 62 that fastens the peripheral portion around the exhalation holes 11 of the upper half 2a of the respiratory mask body 2 and is screwed integrally with the screw hole 61 of the exhalation valve front casing 56a on the inner front surface of the rear end flange portion front surface 63.

[0062] The exhalation valve front casing 56a is provided with an exhalation valve accommodation portion 64, a cover portion 65, a front exhaust hole 66, and three side peripheral exhaust holes 67. Note that 68 is a rotation pin engagement hole.

[0063] As shown in Fig. 12, a flat detachable flap 69 is provided at the left and right centers of the back surface of the base end band 24 of the hat-shaped support band 3, its base end portion 69a is sewn, and a double-folded annular finger hook portion 69b is arranged downward.

[0064] The finger hook annular portion 69b of the detachable flap 69 is provided with a length that allows two fingers of an adult's one hand to fit in. Since the coloring of the appearance is a warm color of the red system because other parts such as the respiratory mask body are composed of a dark color of the black system, a warm color of the red system is selected.

[0065] Since the embodiments of the present invention are provided as described above, when taking out the respiratory mask device stored in, for example, a heat-resistant storage bag, the attachment / detachment flap 69 can instantaneously recognize the front and rear, left and right of the hat-shaped support band 3. Also, when attaching to the face, the left and right central positions of the hat-shaped support band 3 can be recognized throughout the front and rear. As shown in FIG. 3, with respect to the frame-shaped connection ring 25 at the front of the hat-shaped support band 3, the other edge 24b side of the proximal end band 24 is loosened, and two fingers of one hand of the wearer are inserted into the finger-hooking annular portion 69b of the attachment / detachment flap 69 at the rear of the hat-shaped support band 3. Then, the attachment / detachment flap 69 is pulled down with the central portion at the rear of the hat-shaped support band 3 placed on the head facing the cervical vertebra below the back of the wearer's head, and after putting on the hat-shaped support band 3 on the head with the central portion at the rear of the hat-shaped support band 3 aligned with the cervical vertebra position of the wearer's spine, the other edge 24b side of the proximal end band 24 at the front of the hat-shaped support band 3 is turned to the right by the other vertical rod portion 25b of the frame-shaped connection ring 25. Then, the male portion 26a and the female portion 26b of the velvet fastener 26 are joined in contact to put on the hat-shaped support band 3 on the head at the correct front, rear, left, and right positions. Also, the hat-shaped support band 3 on the head can be easily removed in the reverse order. And since the front, rear, left, and right central positions of the head are aligned with the front, rear, left, and right central positions of the hat-shaped support band 3, the central position is correctly set also for the respiratory mask body.

[0066] Next, connect the lower end of the left front elastic suspension band 4a from the left front side of the hat-shaped support band 3 to the left front tip 17a11 of the left front support rod 17a1 of the left V-shaped support rod part 17a of the balance maintaining plate 17, and connect the lower end of the left rear elastic suspension band 5a to the left rear tip 17a21 of the left rear support rod 17a2 of the left V-shaped support rod part 17a of the balance maintaining plate 17. Also, connect the lower end of the right front elastic suspension band 4b from the right side to the right front tip 17b11 of the right front support rod 17b1 of the right V-shaped support rod part 17b of the balance maintaining plate 17, and connect the lower end of the right rear elastic suspension band 5a to the right rear tip 17b21 of the right rear support rod 17b2 of the right V-shaped support rod part 17b of the balance maintaining plate 17. Then, connect the respiratory mask body 2 that is attached at two locations on the left and right, namely, the left front support rod 17a1 and the left base 17a3 of the left rear support rod 17a2 of the left V-shaped support rod part 17a of the balance maintaining plate 17, and the right front support rod 17b1 and the right base 17b3 of the right rear support rod 17b of the right V-shaped support rod part 17b. And then, apply and attach the respiratory mask body 2 to the wearer's face.

[0067] Regarding the respiratory mask body 2, taking the pulling strength of the left front elastic suspension band 4a, the left rear elastic suspension band 5a, the right front elastic suspension band 4b, and the right rear elastic suspension band 5b as an example, for the left front elastic suspension band 4a, it is folded in half around the left front connecting ring 28a, and the distance between the left front connecting ring 28a and the left front female hook button 22a2 can be adjusted according to the position where the male part 33a1 and the female part 33a2 of the velvet fastener 33a are joined to obtain an appropriate tension.

[0068] The adjustment of the tension of the four elastic suspension bands such as the left front elastic suspension band 4a is carried out by grasping the left adjustment gripper 21a or the right adjustment gripper 21b with one hand of the wearer, moving the respiratory mask body 2 to an appropriate position on the face, then pressing and holding its position. For example, grasping the thick-diameter both ends 31a2 of the left front elastic suspension band 4a with the other hand to release the connection between the male part 33a1 and the female part 33a2 of the Velcro fastener 33a, or grasping the thick-diameter both ends 32a2 of the left rear elastic suspension band 5a to release the connection between the male part 34a1 and the female part 34a2 of the velvet fastener 34a, moving the thick-diameter both ends 31a2 in the extension direction or the contraction direction around the connecting ring 28a that suspends the left front elastic suspension band 4a, or moving the thick-diameter both ends 32a in the extension direction or the contraction direction around the connecting ring 29a that suspends the left rear elastic suspension band 5a, and then reconnecting the male part 33a1 and the female part 33a2 of the Velcro fastener 33a to adjust the tension applied to the respiratory mask body 2.

[0069] Next, grasp the left adjustment gripper 21a or the right adjustment gripper 21b with one hand of the wearer, press and hold the respiratory mask body 2 that is being moved to an appropriate position, grasp the thick-diameter both ends 31b2 of the right front elastic suspension band 4b with the other hand to release the connection between the male part 33b1 and the female part 33b2 of the Velcro fastener 33b, or grasp the thick-diameter both ends 32b2 of the right rear elastic suspension band 5b to release the connection between the male part 34b1 and the female part 34b2 of the velvet fastener 34b, move the thick-diameter both ends in the extension direction or the contraction direction around the connecting ring 28b or 29b that suspends the right front elastic suspension band 4b or the right rear elastic suspension band 5b, then reconnect the male part 33b1 and the female part 33b2 of the Velcro fastener 33b, or reconnect the male part 34b1 and the female part 34b2 of the velvet fastener 34b to adjust the tension applied to the respiratory mask body 2.

[0070] At the lower left front connection part 4a21 of the left front elastic suspension band 4a, the attachment of the left front female hook button 22a2 is provided integrally with the left front elastic suspension band 4a as shown in Fig. 9. Therefore, to engage the left front female hook button 22a2 with the left front male hook button 22a1, they can be easily joined by simply applying pressure in the engaging direction.

[0071] The connection between the attachment points on the left and right side surfaces of the respiratory mask body 2 and the left and right front elastic suspension bands 4a, 4b or the left and right rear elastic suspension bands 5a, 5b is not a direct connection, but a balance - maintaining plate 17 is interposed in between. Therefore, after the pressure on the respiratory mask body 2 is concentrated at the attachment points, it is dispersed throughout the entire respiratory mask body 2, enabling the user to wear it without being stressed and to wear it continuously for a long time.

[0072] Also, since the embodiments of the left front elastic suspension band 4a, the left rear elastic suspension band 5a, the right front elastic suspension band 4b, and the right rear elastic suspension band 5b are configured as described above, taking the left front elastic suspension band 4a as an example, the non - extensible left front lower non - stretchable part 4a2 is sewn and integrally provided at the lower part of the left front upper half elastic band part 4a1 made of an elastic suspension band member, and the lower end is provided at the left front lower end connection part 4a21. The upper end part of the left front upper half elastic band part 4a1 is provided at the left front upper end tubular part 4a11, the insertion small - diameter part 31a1 of the stopper pin 31a is inserted by extending the left front upper end tubular part 4a11, and both ends are provided at the large - diameter both ends 31a2 protruding outward. Therefore, the left front upper end tubular part 4a11 can be extended to easily pull out the stopper pin 31a. Also, it can be exchanged with a new left front elastic suspension band 4a. And the male part 33a1 of the velcro fastener 33a on the left front upper half elastic band part 4a1 is joined to the female part 33a2 of the velcro fastener 33a on the non - extensible suspension band member arranged at the left front lower non - stretchable part 4a2 to adjust the double - folded length. Due to such a configuration, it can be finely adjusted to an interval of as narrow as 1 mm.

[0073] In the left front elastic suspension band 4a, the left rear elastic suspension band 5a, the right front elastic suspension band 4b, and the right rear elastic suspension band 5b, since each is a connection by the male and female parts of each velcro fastener, by moving the connection part, re-pressing and connecting, the overall length of each can be easily and surely changed.

[0074] Since the elastic suspension bands on the left and right and front and rear are easily replaceable, even if aging occurs due to the aging of the rubber part over time, they can be replaced at regular intervals to maintain the predetermined performance.

Industrial Applicability

[0075] In construction work in an environment where harmful gases are generated, and also, the sizing of emergency security supplies for dealing with accidents of survival air-conditioning equipment in a closed environment achieves cost reduction of the supplies, and moreover, contributes to the reduction of maintenance costs to ensure safety.

[0076] Since flat detachable flaps are provided at the left and right centers of the back surface of the base band of the hat-shaped support band, using this as a mark and also as a handle, the hat-shaped support band can be quickly and correctly positioned on the body for wearing.

[0077] By using the wearer's head as a support, the stress and fatigue of wearing are reduced, enabling continuous wearing of the mask for a long period of time.

[0078] Generally, it can maintain a flat surface in a wide range and be applied from a relatively small face to a large face, contributing to the sizing freedom.

[0079] By making the contact surface structure of the mask size-free and soft, and simplifying and streamlining the structure of the mask suspension band, the wearing operation can be simplified and the durability can be extended.

Explanation of Signs

[0080] 1 Respiratory mask device 2 Respiratory mask body Upper half of 2a Lower half of 2b Hat-shaped support band 3 Left-side band body 3a Left front half 3a1 Right rear half 3a2 Right-side band body 3b Right front half 3b1 Left rear half 3b2 Lower end part 3b21 Left and right middle band body 3c Left middle part 3c1 Right middle part 3c2 Left front elastic suspension band 4a Upper half elastic band part of left front 4a1 Upper end tubular part of left front 4a11 Upper half elastic stretch part of left front 4a12 Lower non-stretch part of left front 4a2 Lower end connection part of lower left front 4a21 Right front elastic suspension band 4b Upper half elastic band part of right front 4b1 Upper end tubular part of right front 4b11 Upper half elastic stretch part of right front 4b12 Lower non-stretch part of right front 4b2 Lower end connection part of lower right front 4b21 Left rear elastic suspension band 5a Upper half elastic band part of left rear 5a1 Upper end tubular part of left rear 5a11 Upper half elastic stretch part of left rear 5a12 Lower non-stretch part of left rear 5a2 Lower end connection part of lower left rear 5a21 Right rear elastic suspension band 5b Upper half elastic band part of right rear 5b1 Upper end tubular part of right rear 5b11 Upper half elastic stretch part of right rear 5b12 Lower non-stretch part of right rear 5b2 Lower end connection part of lower right rear 5b21 Intake pipe 6 Concave diameter part 6a Harmful gas removal device 7 Air supply pipe 8 9 Hard part 10 Intake hole 11 Exhaust hole 12 Intake valve mechanism 13 Exhaust valve mechanism 14a Outer peripheral edge 14b Inner peripheral edge 15 Joint surface 16 Closed space 17 Balance maintaining plate 17a Left V-shaped strut part 17a1 Left front strut part 17a11 Left front tip 17a12 Left front mounting hole 17a2 Left rear strut part 17a21 Left rear tip 17a22 Left rear mounting hole 17a3 Left base 17a31 Left base mounting hole 17b Right V-shaped strut part 17b1 Right front strut part 17b11 Right front tip 17b12 Right front mounting hole 17b2 Right rear strut part 17b21 Right rear tip 17b22 Right rear mounting hole 17b3 Right base 17b31 Right base mounting hole 17c Connecting plate part 17c1 Opposite front edge 18a Left mounting hole 18b Right mounting hole 19 Bracket plate 19a Inner diameter hole 20 Protruding support part 21a Left adjustment knob 21b Right adjustment knob 22a1 Left front male hook button 22a11 Bottom plate part 22a2 Left front female hook button 22a21 Mounting hole 22b1 Right front male hook button 22b2 Right front female hook button 23a1 Left rear male hook button 23a2 Left rear female hook button 23b1 Right rear male hook button 23b2 Right rear female hook button 24 Base end band 24a One edge 24b The other edge 24b1 Finger loop 25 Frame - type connecting ring 25a One vertical rod part 25b The other vertical rod part 26 Velvet fastener 26a Male part 26b Female part 27a Left front cap - band hanging band 27a1 Lower end part 27b Right front cap - band hanging band 27b1 Lower end part 28a Left front connecting ring 28b Right front connecting ring 29a Left rear cap - band hanging band 29a1 Lower end part 29b Right rear cap - band hanging band 29b1 Lower end part 30a Left rear connecting ring 30b Right rear connecting ring 31a Stopper pin 31a1 Insertion thin - diameter part 31a2 Thick - diameter both ends part 31b Stopper pin 31b1 Insertion thin - diameter part 31b2 Thick - diameter both ends part 32a Stopper pin 32a1 Insertion thin - diameter part 32a2 Thick - diameter both ends part 32b Stopper pin 32b1 Insertion thin - diameter part 32b2 Thick - diameter both ends part 33a Velvet fastener 33a1 Male part 33a2 Female part 33b Velvet fastener 33b1 Male part 33b2 Female part 34a Velvet fastener 34a1 Male part 34a2 Female part 34b Velvet fastener 34b1 Male part 34b2 Female part 35 Reinforcing material 36 Female hook button mounting seat 36a Shaft part 37 Mounting nut 37a Threaded hole 38 Mounting screw 39 Screw with head 39a Screw rod 40 Mounting nut 40a Threaded hole 41 Threaded hole 42 Recessed part 43 Small-diameter threaded hole 44 Locking small-diameter screw 44a Head 44a1 Lower surface of head 45a Intake valve front-side casing 45b Intake valve rear-side casing 45a1 Front end face 45a2 Rear end face 46 Threaded hole 47 Air passage 48 Binding band 49 Vent hole 50 Intake valve 51 Intake valve shaft part mounting hole 52 Intake valve seat 53a Front face of rear end flange part 53b Rear face of rear end flange part 54 Threaded part 55 Tubular screwing protrusion 56a Exhaust valve front-side casing 56b Exhaust valve rear-side casing 57 Vent hole 58 Exhaust valve shaft part mounting hole 59 Exhaust valve 60 Exhaust valve seat 61 Threaded hole 62 Threaded engagement part Front of the rear end flange part 64 Exhalation valve housing part 65 Cover part 66 Front exhaust hole 67 Side peripheral exhaust hole 68 Pin engagement hole for rotation 69 Detachable flap 69a Base end part 69b Annular finger hook part

Claims

1. The left and right base portions of the left and right front strut portions and the left and right rear strut portions of the left and right V-shaped strut portions are connected by a connecting plate portion to provide a left and right integrated balance maintaining plate. The balance maintaining plate is curved and attached to the outer surface of the lower half of the respiratory mask body. At the same time, the left and right base portions are respectively attached to the outer surfaces of the attachment portions on the left and right side surfaces of the lower half of the respiratory mask body on the outer surfaces of the attachment portions on the left and right side surfaces of the balance maintaining plate, so that the balance maintaining plate and the respiratory mask body are integrally formed. And the connecting plate portion of the balance maintaining plate is supported at a fixed position on the outer surface of the respiratory mask body by a support plate supported by the respiratory mask body. At the tip ends of the left and right front strut portions and the tip ends of the left and right rear strut portions of the left and right V-shaped strut portions of the balance maintaining plate, the lower end portions of the left and right front elastic hanging bands arranged at intervals in the front and rear on the left and right side surfaces of the hat-shaped support band worn by the wearer are detachably connected to the lower end portions of the left and right rear elastic hanging bands respectively. By adjusting the lengths of the left front elastic hanging band, the left rear elastic hanging band, the right front elastic hanging band, and the right rear elastic hanging band respectively, the facial wearing pressure and the wearing position of the respiratory mask body are adjusted for wearing. A respiratory mask device for removing harmful gases such as carbon dioxide gas from the breathed air.

2. The left and right base portions of the left and right front strut portions and the left and right rear strut portions of the left and right V-shaped strut portions are connected by a connecting plate portion to provide a left and right integrated balance maintaining plate. The balance maintaining plate is curved and attached to the outer surface of the lower half of the respiratory mask body. The left and right base portions are respectively attached to the outer surfaces of the attachment portions on the left and right side surfaces of the lower half of the respiratory mask body on the outer surfaces of the attachment portions on the left and right side surfaces of the balance maintaining plate, so that the balance maintaining plate and the respiratory mask body are integrally formed. In addition, the connecting plate portion of the balance maintaining plate is engaged with a rigid portion formed on the outer surface of the respiratory mask body and supported at a fixed position on the outer surface of the respiratory mask body. To the front end portions of the left and right front strut portions and the front end portions of the left and right rear strut portions of the left and right V-shaped strut portions of the balance maintaining plate, the lower end portions of the left and right front elastic hanging bands and the left and right rear elastic hanging bands arranged at intervals in the front and rear directions on the left and right side surfaces of the hat-shaped support band worn by the wearer are detachably connected respectively. The lengths of the left front elastic hanging band, the left rear elastic hanging band, the right front elastic hanging band, and the right rear elastic hanging band are adjusted respectively to adjust the facial wearing pressure and the wearing position of the respiratory mask body for wearing, a respiratory mask device for removing harmful gases such as carbon dioxide gas.

3. The attachment of the attachment portions on the left and right side surfaces of the lower half of the respiratory mask body and the left and right base portions of the left and right front strut portions and the left and right rear strut portions of the balance maintaining plate with a V shape on the left and right is such that left and right adjustment knobs are attached by attachment means. One of the left and right adjustment knobs is supported by one hand of the wearer, or the other of the left and right adjustment knobs is supported by the other hand of the wearer. The lengths of the left front elastic hanging band, the left rear elastic hanging band, the right front elastic hanging band, or the right rear elastic hanging band released from the front end portions of the left and right front strut portions and the left and right rear strut portions of the left and right V-shaped strut portions are adjusted to adjust the facial wearing pressure of the respiratory mask body and worn on the face of the wearer. The respiratory mask device for removing harmful gases such as carbon dioxide gas according to Claim 1 or Claim 2.

4. The left and right base mounting holes of the left and right V-shaped strut parts are made to correspond to left and right mounting holes that open in the mounting parts on the left and right side surfaces of the lower half of the respiratory mask body. A screw rod of a screw with a head is inserted respectively from the inner side of the respiratory mask body outward through the left and right mounting holes and the outer sides of the left and right base mounting holes, and mounting nuts are screwed onto the tip ends of the respective screw rods to fasten the respiratory mask body. At the same time, the tip end of the screw rod is inserted through the left and right base mounting holes of the left and right bases of the left and right V-shaped strut parts and protrudes further outward. Left and right adjustment knobs having a shape in which the outer periphery of the end portion expands in a flange shape are screwed and fastened to the protruding screw rods, and the left and right adjustment knobs are integrally mounted and provided on the left and right outer side surfaces of the respiratory mask body. The respiratory mask device for removing harmful gases such as carbon dioxide gas from the air according to claim 1 or claim 2.

5. The hat-shaped support band is provided with at least a left band body in which at least the left front half and the right rear half are passed through the center of the top portion to the annular base end band, a right band body in which the right front half and the left rear half are passed through the center of the top portion to the base end band, and left and right intermediate band bodies in which the left intermediate portion and the right intermediate portion are passed through the center of the top portion to the base end band. One edge of the base end band is bent and sewn into a tubular shape and is fitted and connected to one vertical rod portion of the frame-shaped connecting ring. A male part and a female part of a velvet fastener are provided on the outer surface of the other edge side of the base end band for a required length, and a finger hook ring is connected to the other edge. After the finger hook ring is inserted from the inner side to the outer side through the other vertical rod portion of the frame-shaped connecting ring and pulled out, it is bent at the other vertical rod portion of the frame-shaped connecting ring and reversed to the other side, and the male part and the female part of the velvet fastener facing each other are joined in contact, and it is provided so as to be adjustable to a length around the outer periphery of the wearer's head and can be worn loosely or tightly. The respiratory mask device for removing harmful gases such as carbon dioxide gas from the air according to claim 1 or claim 2.

6. On the outer surface of the lower end portion of the left intermediate portion of the left and right intermediate band bodies of the hat-shaped support band, a left front suspension band of the hat-shaped support band having a left front connection ring provided at the lower end portion is provided, and on the outer surface of the lower end portion of the right intermediate portion, a right front suspension band of the hat-shaped support band having a right front connection ring provided at the lower end portion is provided respectively. On the outer surface of the lower end portion of the left rear half of the right band body of the hat-shaped support band, a left rear suspension band having a left rear connection ring provided at the lower end portion is provided, and on the outer surface of the lower end portion of the right rear half of the left band body of the hat-shaped support band, a right rear suspension band having a right rear connection ring provided at the lower end portion is provided respectively. The respiratory mask device for removing harmful gases such as carbon dioxide gas from the air according to claim 1 or claim 2.

7. The respiratory mask device for removing harmful gases such as carbon dioxide according to claim 1 or claim 2, wherein the base end portion is attached to the left and right centers of the outer surface of the back portion in the base end band of the hat-shaped support band, and a detachable flap having a double-folded annular finger hook portion facing downward is arranged.

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