TW201701924A - Hood type gas mask - Google Patents

Abstract

The present invention relates to a hood-type gas mask comprising: a hood provided with a visor in front thereof; a shield, on the inner lower part of the hood, for isolating the entire head from the outside; a nose mask provided inside the hood to isolate the nose and mouth of a wearer inside the hood; an exhalation valve cover provided on the front surface of the hood corresponding to the mouth of the wearer; an exhalation valve connector unit penetrating the nose mask to be coupled with the the exhalation valve cover; an exhalation valve disposed in between the exhalation valve connector unit and exhalation valve cover; purification cartridges provided on both sides of the front of the hood, with the exhalation valve cover in the center; purification cartridge connector units, each penetrating the nose mask to be attached to the purification cartridge; and webbing, connected to the purification cartridge connector units, for tightening to apply pressure to the hood so as to to closely attach the nose mask to the mouth and nose of the wearer, wherein the exhalation valve connector unit and purification cartridge connector units can be individually separated.

Description

Headgear gas mask

The present invention relates to a hood-type gas mask, and more particularly to a hood-type gas mask capable of minimizing a volume and thus being easy to store and carry.

The gas mask is worn to block harmful substances in the air and protect the face. According to the structure, it can be divided into a comprehensive type, a half-face type, and a cover type.

The full-scale gas mask includes: a facepiece that is in close contact with the wearer's face as a whole to block the entrance of the surrounding air; a face lens formed on the mask portion to enable the wearer to look at the front; and a mask portion And a filter cartridge for filtering the polluted air; an inhalation valve disposed in the purifying cartridge to allow air to enter the mask portion and block the air exhaled by the wearer; and being disposed in the mask portion to exhale the wearer The exhalation valve that the gas discharges to the outside of the mask portion covers the head of the wearer so that the mask is in close contact with the head harness of the wearer's face.

The full-face type gas mask has a structure that provides a wide field of vision to the wearer and does not cause the gas mask to fall off under the violent action of the wearer, and thus is used for fire fighting, military use, and the like.

In addition, although the half-face gas mask is similar to the full-face type described above, the half-face gas mask is configured to provide a purifying cylinder, an inhalation valve, and a row in a nose mask that separates only the wearer's nose and mouth from the outside. Air valve, adjusting rope, etc. This half-faced gas mask is constructed for operators who operate in places with high dust density in the atmosphere such as carbon mines, chemical plants, and construction sites.

In addition, the hood-type gas mask is mainly used in subways, department stores, and other places where civilians gather, and is used to escape and save in emergency situations such as fires. The general civilians who are not trained and can be easily worn, and then set the lens, nose mask, purifying cylinder, inhalation valve, exhaust valve, and adjustment in the pocket-shaped hood that covers the entire head of the wearer. rope.

A conventional technique of such a hood-type gas mask is explained based on Fig. 1. Fig. 1 is a cross-sectional view showing a conventional hood-type gas mask. Referring to the drawings, a headgear gas mask according to the prior art is provided with a face lens 2 on the head cover 1, and a purification cylinder 4 is provided in the vent hole 3 formed in the head cover 1. Further, a ring-shaped diaphragm 5 is formed inside the head cover 1 to allow the wearer's head to enter and exit and isolate the head from the outside, and has an adjusting cord 6 to abut against the nasal mask that isolates the wearer's nose.

Further, in order to permanently fix the purification cylinder 4 and the head cover 1, the vent hole 3 and the purification cylinder 4 are fixed by the metal belt 7, and at this time, the purification cylinder 4 forms a tubular-shaped projection 4a, and the projection 4a is inserted into the vent hole of the hood 1. After that, it is connected to the nasal mask 8 formed inside the head cover 1.

The hood-type gas mask according to this prior art is provided in a specific place as described above, so that the volume occupied by the gas mask can be minimized for folding and storage. For this reason, the head cover is made of a heat-resistant heat insulating material such as an aramid fabric, so that the head cover can be folded to minimize the volume.

In particular, gas masks have recently been developed: a gas mask with two purification cartridges in the hood to allow the wearer to breathe with low resistance to increase the amount of cleaned air, and even if the cartridge cannot perform itself The effect can also be to purify the contaminated air by another purification cylinder to allow the wearer to breathe.

The gas mask having the two purifying cartridges has a configuration in which a purifying cylinder is stably fixed to the hood, and a hood is provided with a plate-shaped purifying cartridge fixing plate. Further, an exhaust valve is provided at the center of the purifying cartridge fixing plate member, and a purifying cylinder is disposed on both sides of the purifying cartridge fixing plate member around the exhaust valve.

However, the hood-type gas mask in which the two purifying cartridges are disposed in the purifying cartridge fixing plate as described above has the following dangers: the purifying cartridge fixing plate member is formed of an inflexible plate shape, and therefore, when wearing the gas mask The nasal mask cannot be in close contact with the wearer's face, so that the wearer not only feels the foreign body sensation, but even if the adjustment cord is adjusted according to the wearer's head, the shape of the wearer's face cannot be deformed and purified. The plate member is fixed so that the nasal mask cannot be in close contact with the wearer's face, and the contaminated air cannot pass through the purification cylinder, but flows through a gap formed between the wearer's face and the mask.

In addition, since the cleaning cylinder fixing plate cannot be bent, the volume of the cleaning cylinder fixing plate cannot be reduced when the gas mask is stored, so that there is a limitation in reducing the overall volume, and the space occupied by the gas mask is large, so it exists in Limited space does not provide the problem of a larger number of gas masks.

In addition, in order to maintain the performance of the purification cartridge, the purification cartridge needs to be replaced every predetermined period, but the gas mask according to the prior art is a structure in which the hood and the purification cartridge are permanently fixed by a metal belt, so that it is not possible to replace only the purification, and thus there is a need to replace it. The problem with the entire gas mask.

Accordingly, in order to solve the above problems, the applicant of the present invention applied for the "headgear gas mask" of Korean Patent No. 10-2014-0140885, which was approved on March 11, 2015.

A conventional technique applied by the applicant of the present invention is that the purifying cartridge connecting port portion is passed through the nasal mask to be assembled with the purifying cartridge fastening ring, and the mounting portion having the purifying cartridge connecting port portion penetrating the purifying fastening ring is fastened to the purifying cartridge. Since the suction hole has a structure, the plurality of purification cylinder connection ports and the exhaust valve connection port disposed on the front surface of the head cover are individually divided, and the volume of the gas mask can be minimized and stored and carried.

However, this conventional technique has a problem that the fastening of the purifying cylinder portion and the purifying cylinder is loosened, and therefore, the outside air flows into the gas mask due to the loose slit, or the purifying cylinder is separated from the outlet of the purifying cylinder.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a hood-type gas mask which minimizes the volume of a gas mask when storing a hood-type gas mask having two purification cartridges It is easy to store and carry.

Further, it is an object of the present invention to provide a hood-type gas mask which can be easily adjusted when the hood is worn so that the hood can be closely attached to the hood Wear the head.

Further, an object of the present invention is to provide a hood-type gas mask which can be provided in a gas-tight manner in a purifying cartridge fixing plate and can be easily separated and purified as needed.

Further, it is an object of the present invention to provide a hood-type gas mask capable of mutually reinforcing a nasal mask, a hood, and a purifying cartridge fixing plate.

The present invention is achieved by a hood-type gas mask comprising: a head cover 100 having a face lens 110 disposed on a front surface thereof; a diaphragm 107 formed at an inner lower end portion of the head cover 100 and having a head portion as a whole External isolation; a nasal mask 200 disposed on an inner side of the head cover 400 to isolate the wearer's nose from the mouth inside the head cover; an exhaust valve cover 400 disposed on the front surface of the head cover 400 to correspond to a mouth of the wearer; an exhaust valve connection port 410 penetrating the nasal mask 200 to be fastened with the exhaust valve cover 400; an exhaust valve 420 disposed at the exhaust valve connection port portion 410 and the row Between the valve cover 400, the purification cylinder 500 is disposed on both sides of the front surface of the head cover 100 around the exhaust valve cover 400; the cleaning cylinder connection port portion 510 passes through the nasal mask 200 to The purifying cartridge 500 is fastened; the webbing 600 is coupled to the purifying cartridge connecting port portion 510 to be tightened while pressing the head cover 100 so that the nasal mask 200 is in close contact with the wearer's mouth and nose.

The exhaust valve connection port portion 410 and the purge cylinder connection port portion 510 are separated from each other and are configured independently.

The cleaning cylinder connecting port portion 510 includes a through portion 512 formed with a communication hole 511 penetrating through the head cover 100 and the nasal mask 200 and communicating with the purification cylinder 500; The abutting portion 513 is formed on one side of the penetrating portion 512 and has a diameter larger than the diameter of the penetrating portion 512 to be in close contact with the inner side surface of the nasal mask 200. The mounting portion 514 is formed in the penetrating portion 512. The other side is inserted into the suction hole 502 formed in the protruding portion 501 of the purification cylinder 500; and the purification cylinder fastening ring 530 is fastened to the through portion 512 penetrating the head cover 100 and connected to the webbing 600 .

The through portion 512 is characterized in that a pressing block 512a is formed, and the pressing block 512a presses the cleaning cylinder fastening ring 530 into a portion facing the abutting portion 513, and forms a block 531. The slider 531 is biased by the pressing block 512a in the soft portion of the cleaning cartridge fastening ring 530 to fasten the pressing block 512a and the slider 531.

The purification cartridge 500 has a feature that a pressure protrusion 504 is formed along the circumference of the protrusion 501, and a seating groove 532 is formed, when the purification cylinder 500 is fastened with the purification cylinder connection port 510 The pressing protrusion 504 presses the sealing member 520, wherein the seating groove 532 places a sealing member 520 on one side of the purification cylinder fastening ring 530 facing the pressing protrusion 504.

The exhaust valve connecting port portion 410 includes: a dredging portion 431 forming a dredging hole 431a and internally provided with an exhaust valve 420 penetrating through the head cover 100 and the nasal mask 200 and with the exhaust valve The cover 400 is in communication; a shoulder 432 is formed on one side of the dredging portion 431 and has a diameter larger than the dredging portion 431 and is in close contact with the inner side surface of the nasal mask 200; and an exhaust valve fastening ring 440 a block end portion 442 is formed on the inner peripheral surface, and a block step 445 is formed on the outer peripheral surface, wherein the block end portion 442 is fastened with a hook 431b formed on an outer peripheral surface of the unblocking portion 431, the block The step 445 is fastened to a block formed on the inner circumferential surface of the exhaust valve cover 400.

The webbing 600 includes a connecting cord 610 disposed at a lower rear portion of the head cover 100 such that a rear surface of the head cover 100 is in close contact with a wearer's head and has a latch at each end. 630, and extending toward the purification cylinder connection port 510; and an adjustment cord 620 extending toward the purification cylinder connection port 510 in a rear upper portion of the head cover 100, the two ends respectively penetrating the purification cylinder The connecting ring 534 formed by the fastening ring 530 is bound by the latch 630.

The head cover 100 further includes: a fixing portion 120 that provides a ring-shaped hole to be embedded in the adjusting rope 620 of the webbing 600 to form a through state to prevent the adjusting rope 620 from slipping; the webbing 600 passes The latch 630 connects the two ends of the adjusting cord 620 with the connecting cord 610, according to which the connecting cord 610 is pulled according to the pulling of the adjusting cord 620.

Here, the face lens 110 further includes a folding tool to provide a portion capable of partially folding the face lens 110, the folding tool weakening the strength of a portion of the face lens 110 into a line shape to fold the face lens .

In addition, it is preferable that the lock 630 includes a connecting piece 631, one end of which is connected to the connecting ring 534 in an off-axis state, and a tip portion 631a at the other end; a clamping ring 632 to be embedded The state of the connecting piece 631 is fixed to the connecting piece 631 in an off-axis manner, and the adjusting wire 620 is inserted inwardly to be wound in a curved state on the other side, according to the adjustment generated while the adjusting wire 620 is pulled. The tensile force of the cord 620 causes the connecting piece 631 to rotate off-axis, whereby the adjusting cord wound on the other side is in close contact with the tip portion 631a of the connecting piece 631 while the other side is rotated off-axis about one side. The adjusting cord 620 is held together with the connecting piece 631; and the fixing tool 633 is fixed such that one side of the clamping ring 632 is rotatably fixed to the connecting piece 631.

In addition, it is preferable that the fixing tool 633 has an inclined block 633a and a straight block 633b perpendicular to the inclined block 633a on both sides of one side surface of the connecting piece 631 on the side where the clamping ring 632 is disposed. One side of the clamping ring 632 inserted between the inclined block 633a and the straight block 633b by the tilting block 633a according to the interference fit is caught by the tilting block 633a and the straight block 63b, thereby being movably constrained to the One side of the connecting piece 631 is described.

In addition, a coupling member is further included to detachably couple the exhaust valve cover 400 to the exhaust valve fastening ring 440.

The coupling member includes: a block 404 protrudingly formed on an inner circumferential surface of the exhaust valve cover 400; and a block step 445 formed on an outer circumferential surface of the exhaust valve fastening ring 440 to be stuck and tight The card block 404 is fixed.

Preferably, the end portion of the block 404 that is caught by the block step 445 forms a semi-circular cross section, and is detachably restrained by the exhaust valve fastening ring 440.

Further, it is preferable that a plurality of attachment portion fastening projections 514a and suction hole fastening projections 502a are formed on the outer circumferential surface of the attachment portion 514 and the inner circumferential surface of the suction hole 502, and are arranged in a spiral shape. Fasten.

According to the hood-type gas mask of the present invention, since the plurality of purification cylinder connection ports and the exhaust valve connection ports disposed on the front surface of the hood are individually divided, the volume of the gas mask can be minimized, thereby not only Easy to store and carry, it also minimizes the size of the gas mask to reduce the size of the packaging box used to package the gas mask, thereby saving packaging costs.

In addition, the folding line is formed on the facial lens, and when the wearer wears the hood, the facial lens is curved to conform to the wearer's facial zigzag, thereby pulling the wearer's eyes and the facial lens, thereby making it easier. Ensure visibility.

In addition, when the wearer wears the hood, the adjustment cord of the webbing is pulled, so that the back of the hood is closely attached to the back of the wearer, and even if the wearer wears the gas mask, the violent activity continues. It is also possible to stably place the gas mask on the wearer's head, thereby improving the wearer's activity.

In particular, the folding line forms a straight line in the center of the face lens, and the face lens is folded around the center folding line, so that the face lens can be bent to conform to the wearer's face zigzag.

Further, the head cover is provided with a fixing portion for fitting the adjustment cord of the webbing in a penetrating state, whereby the adjustment cord can be prevented from slipping off the head cover.

In addition, the two ends of the adjusting rope are connected to the connecting rope by a lock, whereby the connecting rope is pulled according to the pulling of the adjusting rope.

Further, the exhaust valve cover is separated from the exhaust valve fastening ring according to the coupling member, and in particular, the end portion of the block forms a semicircular cross section, so that it is easy to decompose the exhaust cover and is easy to clean after disassembly. The coupling member is composed of a block and a step block and the exhaust valve cover is detachably coupled to the exhaust valve fastening ring.

Furthermore, the adjusting cord of the webbing is composed of an elastic band, so that the elastic band ensures elasticity; and the hook is formed at the end of the adjusting cord, so that it is easy to insert the finger to pull the adjusting cord, and in the case where the hook is composed of an elastic rubber ring Underneath, it is possible to ensure the elasticity at the hook.

100‧‧‧ head cover

101‧‧‧ wing

101a‧‧‧ cutting line

103‧‧‧Head cover side exhaust valve through hole

105‧‧‧Head cover side purification tube through hole

107‧‧‧Separator

110‧‧‧Face lens

112‧‧‧Folding line

120a‧‧‧First fixed department

120b‧‧‧Second fixed department

122‧‧‧ Film

200‧‧‧ nasal mask

203‧‧‧ nasal mask side exhaust valve through hole

205‧‧‧ nasal mask side purification tube through hole

400‧‧‧Exhaust valve cover

402‧‧‧Ventinel

404‧‧‧ card block

410‧‧‧Exhaust valve connection port

420‧‧‧Exhaust valve

431‧‧‧Drainage Department

431a‧‧‧through hole

431b‧‧‧ hook

432‧‧‧ shoulder

440‧‧‧Exhaust valve fastening ring

442‧‧ ‧ end of the block

445‧‧‧Clock ladder

500‧‧‧purification cartridge

500a‧‧‧ Purification cartridge body

500b‧‧‧purification cover

501‧‧‧Protruding

502‧‧‧Inhalation hole

502a‧‧‧Sucking hole fastening bulge

502b‧‧‧block bulge

504‧‧‧pressure bulge

510‧‧‧ Purification tube connection port

511‧‧‧Connected holes

512‧‧‧through department

512a‧‧‧ Pressing block

513‧‧‧ Closely

514‧‧‧Installation Department

514a‧‧‧Mounting section fastening bulge

514b‧‧‧ card slot

514c‧‧‧Guide

520‧‧‧Seal parts

530‧‧‧ Purification cartridge fastening ring

531‧‧‧ card block

532‧‧‧Place slot

533‧‧‧ bump

534‧‧‧Connecting ring

600‧‧‧webbing

610‧‧‧Connected rope

620‧‧‧Adjustment rope

621‧‧‧ Rubber ring

630‧‧‧Lock

631‧‧‧Connecting piece

631a‧‧‧ pointed

632‧‧‧ clamping ring

633‧‧‧Fixed tools

633a‧‧‧ tilt block

633b‧‧‧Line block

635‧‧‧Connecting Department

634‧‧‧ tip

636‧‧‧ casing

1 is a cross-sectional view showing a hood-type gas mask of the prior art; FIG. 2 is a plan view showing a hood-type gas mask according to the present invention; and FIG. 3 is a hood type according to the present invention. Side view of the gas mask; Fig. 4 is an exploded view showing the joint relationship of the headgear gas mask according to the present invention; Fig. 5 is an exploded perspective view showing the headgear gas mask according to the present invention; Is a cross-sectional view showing a hood-type gas mask according to the present invention; Fig. 7 is an enlarged view showing a portion A of Fig. 6; and Fig. 8 is an enlarged view showing a portion B of Fig. 6; 9 is a perspective view showing a buckle in a headgear gas mask according to the present invention; and FIG. 10 is a side view showing an operation state of a buckle in a headgear gas mask according to the present invention; FIG. 11a Is a perspective view showing a first fixing portion of the hood type gas mask according to the present invention; and FIG. 11b is a perspective view showing a second fixing portion of the hood type gas mask according to the present invention; Figure 12 is a cross-sectional view showing a state before assembly of the purification cartridge in the hood-type gas mask according to the present invention; and Figure 13 is a cross-sectional view showing a state in which the purification cartridge is assembled in the hood-type gas mask according to the present invention. .

The terms used in this specification and the scope of the patent application should not be defined as a general or lexicographical meaning, but rather should only explain the inventor's principle of appropriately defining the terminology in order to explain his invention in the best way. The meanings and concepts in accordance with the technical idea of the present invention are met.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 2 is a plan view showing a headgear gas mask according to the present invention; Fig. 3 is a side view showing a headgear gas mask according to the present invention; and Fig. 4 is a view showing a head cover according to the present invention. An exploded view of the combination of gas masks.

Referring to the drawings, a hood-type gas mask according to the present invention includes: a face lens 110 forming a foldable fold line 112; a head cover 100 having a face lens 110 disposed on the front side; and a nasal mask 200 disposed inside the head cover 100; An exhaust valve cover 400 disposed on a front surface of the head cover 100 to correspond to a mouth of the wearer; an exhaust connection surface 410 fastened to the exhaust valve cover 400 on the inner side of the nasal mask 200; An exhaust valve 420 between the interface portion 410 and the exhaust valve cover 400; a purification cylinder 500 disposed on both sides of the front surface of the head cover 100 with the exhaust valve cover 400 as the center; and an inner side of the nasal mask 200 and the purification cylinder 500 The solid purifying cartridge connection port portion 510 is connected to the purifying cartridge connecting port portion 510 so that the head cover 100 is in close contact with the webbing 600 of the wearer's head.

Further, the head cover 100 is formed of a pocket shape in which the diaphragm 107 is formed at the lower portion, and is capable of sealingly covering the head of the wearer, and the head cover 100 is made of a coating that reflects the heat of the aluminum or the heat resistance of the flame. Heat-dissipating fabric (for example, aramid flame-retardant fabric or aluminum coating, etc.).

The diaphragm 107 formed inside the head cover 100 is composed of a flexible material such as rubber which is elastic, and thus is worn by an opening (not shown) formed in the diaphragm 107 when the wearer wears the head cover 100 on the head. The head of the person enters and After the hood 100 is worn, the diaphragm 107 is in close contact with the neck of the wearer to isolate the inside and the outside of the hood 100.

In addition, a face lens 110 is formed on the front surface of the head cover 100 to enable the wearer to look at the front. At this time, the face lens 110 forms a folding tool that provides a portion that can fold a part of the face lens 110, and when the hood 100 is folded and stored, the face lens 110 can be folded together with the hood 100, and the entire volume of the gas mask can be reduced.

At this time, the folding tool weakens the rigidity of a portion of the face lens 110 into a line shape to enable the face lens 110 to be folded, and such a folding tool includes the folding line 112.

Such a folding line 112 is such that a portion where the folding line 112 is formed by press working or the like has a thickness thinner than other portions of the face lens 110, and further has flexibility (bending or twisting property).

At this time, the folding line 112 formed on the face lens 110 as shown in Fig. 2 or Fig. 3 is formed so as to straddle the portion corresponding to the center of the face lens 110 in the upper and lower directions, or to the upper end and the lower end of the face lens 110. The form formed by extending to the center can be implemented in various forms.

That is, the face lens 110 as shown by the broken line in Fig. 2 is such that the folding line 112 can be formed longitudinally, and unlike this, the folding line 112 can be formed laterally.

At the same time, the folding line 112 formed on the face lens 110 is formed on one of the outer side surface or the inner side surface (the surface corresponding to the inner side of the head cover) of the face lens 110, or may be formed on both sides.

As described above, when the folding line 112 is formed on the face lens 110, the face lens 110 can be folded together when the hood is folded, and the volume of the gas mask can be minimized, thereby not only reducing the storage space but also wearing the wearer. When the head cover 100 is worn, the face lens 110 is bent to conform to the wearer's face zigzag, so that the wearer's eyes and the face lens 110 are pulled close to easily secure the field of view.

In particular, as shown by the broken line in FIG. 2, when the folding line 112 is formed in a straight line at the center, as shown in an enlarged view of FIG. 2, a longitudinal straight groove is formed in the center by the folding line 112, so that the center is centered. The face lens 110 is folded. because Thus, the face lens 110 is curved to conform to the wearer's facial zigzag.

Further, the hood-side purification cylinder through-hole 105 and the hood-side exhaust valve through-hole 103 are formed, and the purification cylinder 500 and the vent cover 400 are provided in the lower portion of the face lens 110 on the front surface of the hood.

At this time, the head cover side exhaust valve through hole 103 is formed in the lower portion of the front surface of the head cover 100 to correspond to the wearer's mouth, and the head cover side purification cylinder is formed on both sides with the head cover side exhaust valve through hole 103 as the center. Through hole 105.

The nasal mask 200 isolates the wearer's nose and mouth in the interior of the hood 100, thereby facilitating the wearer's breathing, and is constructed of a flexible rubber that can be placed in close contact with the wearer's face.

The nasal mask 200 is formed with a nasal mask side exhaust valve through hole 203 and a nasal mask side purification cylinder through hole 205, and is located at an inner side surface of the head cover 100, wherein the nasal side exhaust valve through hole 203 and the nasal mask side are purified. The barrel through hole 205 has the same axis as the head cover side exhaust valve through hole 103 and the head cover side purge tube through hole 105 formed in the head cover 100.

Further, the head cover side exhaust valve through hole 103 formed in the head cover 100 is provided with an exhaust valve cover 400 and an exhaust valve connecting port portion 410, and the head cover side purification cylinder through hole 105 is provided with a purifying cartridge and a purifying cartridge. Interface unit 510. The description will be made based on Figs. 4 to 6 .

4 is an exploded perspective view showing a coupling relationship of a headgear type gas mask according to the present invention; FIG. 5 is an exploded perspective view showing a headgear gas mask according to the present invention; and FIG. 6 is a view showing the present invention according to the present invention. Top cross-sectional view of the hood-type gas mask.

Referring to the drawings, the exhaust valve cover 400 is disposed to have the same axis as the head cover side exhaust valve through hole 103 formed on the front surface of the head cover 100 corresponding to the mouth of the wearer, and is disposed inside the nasal mask 200. The exhaust valve connecting port portion 410 is fastened; the exhaust valve connecting port portion 410 is composed of a dredging portion 431, a shoulder portion 432, and an exhaust valve fastening ring 440.

A plurality of vent holes 402 are formed in the surface of the exhaust valve cover 400, and air discharged through the exhaust valve 420 is discharged to the outside through the vent holes 402. In addition, in the exhaust valve The inner circumferential surface of the cover 400 is formed with a block 404 having a structure in which a block step 445 formed on the outer circumferential surface of the exhaust valve fastening ring 440 is fastened. As described above, if the exhaust valve cover 400 and the exhaust valve fastening ring 440 are fastened by the block 404 and the block step 445, the exhaust valve cover 400 is easily decomposed and the cleaning is easy.

Here, the above-described block 404 and the block step 445 are coupling members that detachably couple the exhaust valve cover 400 to the exhaust valve fastening ring 440. Such a coupling member is caught by the block step 445 as shown below, and the end portion of the protruding block 404 forms a semicircular cross section (refer to FIG. 8), whereby the exhaust valve cover 400 can be detachably fixed at The exhaust valve is fastened to the ring 440.

As described above, when the exhaust valve cover 400 is provided on the front surface of the head cover 100, the exhaust valve fastening ring 440 is provided between the exhaust valve cover 400 and the head cover 100, but the exhaust valve fastening ring 440 is penetrated through the nose. The cover 200 is fastened to the dredging portion 431 of the head cover 100.

In other words, the dredging portion 431 has a tubular shape and can penetrate the head cover 100 and the nasal mask 200, and a dredging hole 431a that communicates with the exhaust valve cover 400 is formed inside the dredging portion 431, and an exhaust valve 420 is provided inside. At this time, the exhaust valve 420 is formed into a flexible film form, and is further supported by the dredging portion 431 and opens the exhaust valve 420 in accordance with the exhalation of the wearer.

Further, as shown in Fig. 8, a shoulder portion 432 is formed on one side of the dredging portion 431, and the drooping portion 431 penetrates the nasal mask side exhaust valve through hole 203 and the head cover side exhaust valve through hole 103 inside the nasal mask 200. Wherein the shoulder 432 has a diameter larger than the dredging portion 431 and abuts against the inner side of the nasal mask 200. Further, a hook 431b is formed on the outer peripheral surface of the dredging portion 431 that protrudes forward of the head cover 100, and the hook 431b is fastened to the block end portion 442 formed in the exhaust valve fastening ring 440.

Further, the block step 445 formed on the outer circumferential surface of the exhaust valve fastening ring 440 is fastened to the block 404 formed on the inner circumferential surface of the exhaust valve cover 400. At this time, the block 404 formed on the inner circumferential surface of the exhaust valve cover 400 has a semicircular cross section, and can be smoothly detached from the block step 445 of the exhaust valve fastening ring 440.

Further, the purifying cartridge 500 is disposed on both sides centering on the exhaust valve cover 400 on the front surface of the head cover 100, and the purifying cartridge 500 is constituted by the purifying cartridge main body 500a and the purifying cylinder cover 500b, and has a perforated plate inside the purifying cartridge main body 500a. ,Filter paper, A filter such as activated carbon can purify the contaminated air and supply it to the inside of the nasal mask 200.

Further, the purifying cartridge 500 is provided with a protruding portion 501 on the other side of the purifying cartridge main body 500a to be fastened to the purifying cartridge connecting port portion 510 disposed inside the nasal mask 200, wherein the protruding portion 501 is formed with the nasal mask side purifying cartridge A suction hole 502 through which the through hole 205 communicates. At the same time, the purification cylinder connection port portion 510 fastened to the purification cylinder main body 500a will be described based on Fig. 7 .

Fig. 7 is an enlarged view showing a portion A of Fig. 6. Referring to the drawings, the purifying cartridge connection port portion 510 includes a through portion 512 formed with a communication hole 511 penetrating the head cover and the nasal mask 200 and connected to the purification cartridge 500, and is formed on one side of the penetration portion 512 and has a larger diameter than a contact portion 513 having a diameter of the portion 512 and abutting against the inner side surface of the nasal mask 200; a mounting portion 514 formed on the other side of the penetration portion 512 and inserted into the suction hole 502 formed in the protruding portion 501 of the purification cartridge main body 500a; A purifying cartridge fastening ring 530 that is fastened to the through portion 512 of the head cover 100 and connected to the webbing 600 is attached.

The penetration portion 512 has a cylindrical shape and internally forms a communication hole 511 that communicates with the purification cylinder 500. The penetration portion 512 penetrates the head cover side purification cylinder through hole 105 and the nose mask side purification tube through hole 205 which are formed in the head cover 100 and the nasal mask 200, respectively. Further, abutting portion 513 is formed on one side of the penetrating portion 512, and the abutting portion 513 has a diameter larger than that of the penetrating portion 512 and is in close contact with the inner side surface of the nasal mask 200.

Further, the attachment portion 514 is formed on the other side of the penetration portion 512, and is inserted into the suction hole 502 formed in the protruding portion 501 of the purification cylinder 500. At this time, as shown by the circle in Fig. 5, the outer circumferential surface of the attachment portion 514 and the suction The inner peripheral surface of the hole 502 is formed with a plurality of mounting portion fastening protrusions 514a and suction hole fastening protrusions 502a and is configured in a spiral shape, and the mounting portion fastening protrusions 514a and the suction hole fastening protrusions 502a are engaged with each other to fasten The purification cylinder 500 and the purification cylinder are connected to the mouth portion 510.

Further, the mounting portion fastening projections 514a are spaced apart by a fixed distance in the outer circumferential surface of the mounting portion 514 and formed in a spiral shape in a clockwise direction, and the suction hole fastening projections 502a are spaced apart by a fixed distance in the inner circumferential surface of the suction hole 502. A spiral shape is formed along the clockwise direction.

Therefore, if the purification cylinder connection port portion 510 is assembled to the purification cartridge 500, the mounting portion fastening projection 514a is positioned between the suction hole fastening projections 502a, and the mounting portion 514 of the purification cylinder connection opening portion 510 is inserted into the suction hole 502 of the purification cartridge 500 to be rotated clockwise, and then mounted. The fastening projection 514a is guided and screwed to the suction hole fastening projection 502a.

At this time, the attachment portion fastening projection 514a and the suction hole fastening projection 502a are disposed at equal intervals on the outer circumferential surface of the attachment portion 514 and the inner circumferential surface of the suction hole 502, and the attachment portion 500 of the purification cartridge connection opening portion 510 is inserted. After the suction hole 502 of the purification cylinder 500 is rotated by a predetermined angle, the purification cylinder 500 and the purification cylinder connection port portion 510 can be quickly fastened or separated.

Further, the penetration portion 512 is formed with a pressing block 512a for pressing the purification cylinder fastening ring 520 against the portion facing the abutting portion 513, and the portion of the pressing block 512a facing the abutting portion 513 has a portion from the penetration portion 512 and the mounting portion 514. The shape in which the boundary protrudes outward.

In addition, the block 531 corresponding to the pressing block 512a is formed in the soft portion of the cleaning cartridge fastening ring 530, the fastening through portion 512 and the cleaning cartridge fastening ring 530, and the nasal mask is interposed between the abutting portion 513 and the pressing block 512a. 200, hood 100.

As described above, when the pressing block 512a and the block 531 are formed in the penetration portion 512 and the purification cartridge fastening ring 530, the penetration portion 512 and the purification cartridge fastening ring 530 can be fastened by the interference fit, so that the pressure can be quickly performed. The through portion 512 and the purification cartridge fastening ring 530 are assembled.

At this time, in the purifying cartridge fastening ring 530, in order to support the head cover 100 firmly, the uneven surface 533 is formed on the surface facing the abutting portion 513, and the head is interposed between the abutting portion 513 and the purifying cartridge fastening ring 530. In the cover 100, the unevenness 533 presses the head cover 100 toward the abutting portion 513 to strongly support the head cover 100.

On the other hand, the purifying cartridge 500 and the purifying cartridge fastening ring 530 have a sealing member 520 and a pressurizing projection 504, respectively, so that the purifying cartridge 500 can be easily separated as needed after being fastened to the purifying cartridge connecting port portion 510. And when the purification cylinder 500 is fastened to the purification cylinder connection port portion 510, the airtightness between the purification cylinder fastening ring 530 facing the purification cylinder 500 can be ensured.

That is, as shown in Fig. 7, the cleaning cartridge 500 is fastened to the purification cartridge. The sealing member 520 of the ring 530 and the pressing protrusion 504 are such that the cleaning cylinder 500 forms a pressing protrusion 504 along the circumference of the protruding portion 501, and the portion of the cleaning cylinder fastening ring 530 facing the pressing protrusion 504 forms a sealing seal. The slot 532 of the component 520 is placed.

At this time, the sealing member 520 may be an O-ring having an elastic restoring force and for preventing fluid from flowing out.

As described above, the sealing member 520 is disposed in the seating groove 532 of the purification cylinder fastening ring 530, and if the pressure projection 504 is formed around the protruding portion 501 of the purification cylinder 500, the purification cylinder 500 and the purification cylinder fastening ring 530 are formed. When tightened, the pressurizing projection 504 presses the sealing member 520, thereby improving the airtightness between the purifying cartridge 500 and the purifying cartridge fastening ring 530.

On the other hand, the cleaning ring fastening ring 530 forms a connecting ring 534 connected to the webbing 600, and according to the wearer pulling the webbing 600, the nasal mask 200 can be brought into close contact with the wearer's nose and mouth to improve the wearer. Activity. This webbing is described in accordance with Figs. 9 and 10.

Fig. 9 is a perspective view showing a lock in a headgear type gas mask according to the present invention; and Fig. 10 is a side view showing a state in which a lock is actuated in the headgear type gas mask according to the present invention.

Referring to the drawing, the webbing 600 is composed of a connecting cord 610 and a adjusting cord 620, and the connecting cord 610 is disposed at the lower rear portion of the head cover 100 such that the rear of the head cover 100 is in close contact with the wearer's head and two of the connecting cords. The ends each have a latch 630 and extend toward the purge cartridge connection port 510.

The adjusting cord 620 and the connecting cord 610 are formed of a resilient belt-shaped elastic band, and the connecting cord 610 is horizontally disposed in the lower rear portion of the head cover 100 toward the purifying cartridge fastening ring 530, and the adjusting cord 620 is behind the head cover 100. The upper middle portion is disposed obliquely to the purge cylinder fastening ring 530.

In addition, the adjusting cord 620 extends toward the purifying cartridge connecting port portion 510 at the upper rear portion of the head cover 100, and the two ends of the adjusting cord 620 respectively pass through the connecting ring 534 formed in the purifying cartridge fastening ring 530 and are bound by the latch 630. According to the wearer pulling the adjustment cord 620, the adjustment cord 620 causes the back of the hood 100 to abut against the back of the wearer's head. For example, the adjustment cord 620 can be realized by a belt-shaped elastic band.

As shown in FIG. 3, the adjusting cord 620 is connected to the connecting cord 610 by a latch 630. That is, the webbing 600 is connected to the adjusting cord 620 and the connecting cord 610 via the latch 630. Accordingly, the connecting cord 610 is also pulled together in the case where the adjusting cord 620 is pulled, thereby tightening the webbing 600. Therefore, the webbing 600 presses the rear surface of the head cover 100 by the adjusting cord 620 and the connecting cord 610 which are simultaneously tightened, so that the rear surface of the head cover 100 is in close contact with the back of the head.

As such, the latch 630 connecting the connecting cord 610 and the adjusting cord 620 is used to lock or unlock the two ends of the adjusting cord 620, and can be implemented in various shapes or configurations. For example, as shown in FIGS. 9 and 10, the latch 630 can be connected. The sheet 631, the clamp ring 632, and the fixing tool 633 are formed.

Further, the connecting piece 631 is connected to the connecting ring 534 formed in the purifying cartridge fastening ring 530 in an off-axis rotation state, and the tip end portion 631a is disposed at the other end portion of the connecting piece 631.

That is, one end of the connecting piece 631 is connected to the connecting ring 534 formed in the purifying cartridge fastening ring 530 in a state of being pivotable, and a tip portion 631a is disposed at the other end. As shown, the connecting piece 631 is formed with a connecting portion 635 formed with a through hole for inserting and fixing the other end of the connecting string 610, and a tip end 634 formed at a free end opposite to the connecting portion 635, The wearer releases the pressurization of the adjustment cord 620 with a finger.

Further, the clamp ring 632 is rotatably fixed to the connecting piece 631 on the side of the state in which it is fitted in the connecting piece 631, and the adjusting wire 620 is inserted inwardly around the other side in a bent state, and is pulled according to the adjusting wire 620. At the same time, the tensile force of the adjusting cord 620 is generated, so that the connecting piece 631 is rotated off-axis, whereby the adjusting cord 620 wound on the other side is closely attached to the connecting piece while the other side is rotated off-axis about the other side. The tip portion 631a of the 631, in turn, holds the adjustment cord 620 together with the connecting piece 631.

As shown in Figs. 9 and 10, such a clamp ring 632 can be inserted and disposed with a tube-shaped sleeve 636 to easily move the adjustment cord 620 wound on the other side of the clamp ring 632 in a bent state. Then, at the end of the adjustment cord 620, there is a rubber ring 621 inserted into the wearer's finger to pull the adjustment cord, thereby enabling the wearer to easily find and adjust the adjustment cord 620.

Here, the rubber ring 621 described above is a ring into which a finger is inserted, and can be made of a rubber of an elastic material, and thus has stretchability.

Further, the fixing tool 633 fixes one side of the clamp ring 632 to the connecting piece 631 in an off-axis manner. The fixing tool 633 is constructed as follows: an inclined block 633a and a straight block 633b are formed, and one side of the clamp ring 632 inserted between the inclined block 633a and the straight block 633b by the inclined block 633a is tilted by the interference fit 633a And the linear block 633b is hung and movably constrained to one side of the connecting piece 631, wherein the inclined block 633a and the straight block 633b are formed on both sides of one side of the connecting piece 631 on the side where the clamping ring 632 is disposed, and the straight block 633b is perpendicular to the tilt block 633a.

As shown in Fig. 10(a), the lock 630 as described above is an adjustment which is produced while the adjustment cord 620 is pulled in a state where the connecting piece 631 is inserted into the clamp ring 632 which is inserted together with the adjustment cord 620. The tensile force connecting piece 631 of the string 620 is rotated off-axis, whereby the tip portion 631a of the connecting piece 631 presses the adjusting wire 620 to the clamping ring 632, so that it can be pressurized and fixed only by the tensile force of the adjusting wire 620. Adjust the cord 620.

Further, as shown in FIG. 10(b), the lock 630 is configured such that when the tip end 634 is pushed outward by the hand, the tip portion 631a is separated from the clamp ring 632 to release the pressure according to the off-axis rotation of the link piece 631. Therefore, the adjustment cord 620 can be unlocked.

In addition, the head cover 100 is provided with a fixing portion 120 to prevent the connecting rope 610 and the adjusting rope 620 from slipping off the head cover 100. Such a fixing portion is constituted by a first fixing portion that supports the connecting rope and a second fixing portion that supports the adjusting rope. Further, description will be made based on Fig. 11a and Fig. 11b.

Fig. 11a is a perspective view showing the first fixing portion of the headgear type gas mask according to the present invention. Referring to the drawings, the first fixing portion 120a is composed of a flap 101 and a film 122. After the blade 101 is formed on the cutting line 101a behind the head cover 100, that is, the seam formed behind the head cover 100 is thermally welded to each other. The outer cover of the head cover 100 is folded and adhered to the rear of the head cover 100.

Further, in a state where the connecting cord 610 is located at the upper portion of the flap 101, the film 122 is formed along the flap 101 formed behind the head cover 100, and the connecting cord 610 is interposed between the film 122 and the head cover 100.

As described above, if the film 122 is formed along the flap 101, the airtightness is prevented by the flap 101 without causing the outside air of the hood 100 to flow in through the flap 101, in order not to cause the connecting cord 610 to slide off the hood 100, the film 122 supports the connecting cord 610.

At this time, the connecting string 610 supported by the first fixing member 120a is disposed to be completely fixed to the head cover 100, for which the connecting string 610 is sewn and fixed together with the flap 101, and the film 122 is formed along the flap 101. The upper portion of the stitched connecting cord 610.

Further, Fig. 11b is a perspective view showing the second fixing portion in the headgear type gas mask according to the present invention. Referring to the drawings, the second fixing portion 120b is constituted by the flap 101 and the film 11 in the same manner as the first fixing portion 120a. The flap 101 is formed by the cutting lines 101a formed behind the head cover 100 facing each other and thermally welded and directed to the hood. The outer side of the 100 is folded to form.

Further, in a state where the adjusting cord 620 is located at the upper portion of the flap 101, the film 122 is formed along the flap 101 formed behind the head cover 100, and the adjusting cord 620 is formed between the film 122 and the head cover. Thus, if the film 122 is formed along the airfoil, the airtight isolation is performed so that the outside air of the head cover 100 does not flow through the airfoil 101, and the film 122 supports the adjustment rope 122 without sliding the adjustment rope 620 from the head cover 100.

As shown in FIGS. 11a and 11b, the fixing portion 120 as described above provides a loop-shaped hole in which the connecting cord 610 and the adjusting cord 620 are fitted in a penetrating state to prevent the webbing 600 from slipping off the head cover 100.

According to the hood-type gas mask of the present invention having the above configuration, the folding line 112 is formed in the face lens 110, and the cleaning cylinder 500 is independently disposed on both sides with the exhaust valve cover 400 as a center, and the suction resistance is small and easy to breathe, and Not only can the folding line 112 be folded around, but also the plurality of cleaning cylinder connecting port portions 510 and the exhaust valve connecting port portion 410 can be separately divided, so that the head cover 100 can be easily folded, and the volume of the gas mask can be minimized, in particular It can be stored in drawers (preferred to be kept in storage boxes) and easy to carry.

As mentioned above, if the volume of the gas mask is minimized, it can be reduced. The size of the box used to package the gas mask is small, thus saving packaging costs.

In addition, the connecting cord 610 of the webbing 600 and the adjusting cord 620 are connected by the lock 630, so that the head cover 100 can be easily disassembled only by the operation of the latch 630, and the adjusting cord of the webbing 600 is pulled when the wearer wears the head cover 100. 620, according to this, the back cover 100 is closely attached to the back of the wearer's head, and even if the wearer wears a gas mask in a state of vigorous activity, it can be stably placed on the wearer's head, thereby improving the fit. The activity of the wearer.

In addition, the folding line 112 is formed on the face lens 110, and when the wearer wears the head cover 100, the head cover 110 is bent in conformity with the wearer's face, and the wearer's eyes are brought closer to the face lens 110, which is easy to ensure. Visibility.

In addition, the present invention is not limited to the above-described embodiments, and modifications and changes may be made without departing from the spirit and scope of the invention, and such modifications and changes should be considered as belonging to the technical idea of the present invention.

For example, in order to be able to easily and quickly fasten the cleaning cylinder and the purifying cylinder connection face, the engaging groove 514b may be formed at the mounting portion fastening protrusion 514a, and the block protrusion 502b may be formed at the suction hole fastening protrusion 502a. Furthermore, description will be made based on FIGS. 1 and 2, and FIGS. 1 and 3.

Fig. 12 is a cross-sectional view showing a state before assembly of the purification cartridge in the headgear gas mask according to the present invention, and Fig. 13 is a cross-sectional view showing a state in which the purification cartridge is assembled in the headgear gas mask according to the present invention.

Referring to the drawings, in order to prevent the fastening state from being unwound by the external force after the fastening portion fixing protrusion 514a is fastened to the suction hole fastening projection 502a, the locking groove 514b is formed at the tip end of the fastening portion 514a of the mounting portion, corresponding to The card slot 514b forms a block protrusion 502b at the tip end of the suction hole fastening protrusion 502a, and when the mounting portion fastening protrusion 514a and the suction hole fastening protrusion 502a are engaged with each other, the card block protrusion 502b is stuck. The slot 514b is stuck.

At this time, the block projection 502b formed at the tip end of the suction hole fastening projection 502a is formed in the same shape as the hook, for example, the slider projection 502b forms a shape which becomes larger in the counterclockwise direction from the clockwise direction, The purification cylinder 500 is prevented from being separated from the purification cylinder connection surface 510 for no reason.

Further, the other end of the mounting portion fastening projection 514a forms a guide surface 514c that guides the tab projection 502b of the suction hole fastening projection 502a. The guide surface 514c is formed to be inclined toward the end of the mounting portion 514 in the other surface of the mounting portion fastening projection 514a, and further, the insertion portion 514 of the cleaning cartridge connection surface 510 is inserted into the suction hole 502 of the purification cartridge 500 to be tight. When the attachment portion 514 of the cartridge connection surface 510 is rotated and fixed, the suction hole fastening projection 502a smoothly enters along the guide surface 514c, and the purification cartridge 500 and the purification cartridge connection surface 510 can be easily and quickly fastened.

100‧‧‧ head cover

110‧‧‧Face lens

112‧‧‧Folding line

200‧‧‧ nasal mask

400‧‧‧Exhaust valve cover

500‧‧‧purification cartridge

500a‧‧‧ Purification cartridge body

500b‧‧‧purification cover

530‧‧‧ Purification cartridge fastening ring

610‧‧‧Connected rope

620‧‧‧Adjustment rope

621‧‧‧ Rubber ring

630‧‧‧Lock

631‧‧‧Connecting piece

632‧‧‧ clamping ring

634‧‧‧ tip

Claims (6)

A hood-type gas mask comprising: a hood having a face lens disposed on a front surface; a diaphragm formed at an inner lower end portion of the hood and isolating the entire head from the outside; a nasal mask disposed at the head An inner side of the cover, the nose of the wearer is isolated from the inside of the head cover; an exhaust valve cover disposed on a front surface of the head cover to correspond to a mouth of the wearer; Passing through the nasal mask to be fastened with the exhaust valve cover; an exhaust valve disposed between the exhaust valve connection port and the exhaust valve cover; and a purging cylinder with the exhaust valve cover Centered on both sides of the front side of the hood; a purging cartridge connecting mouth portion penetrating the nasal mask to be fastened with the purifying cartridge; and a webbing connected to the purifying cartridge connecting port portion to be tightened Simultaneously pressing the hood so that the nasal mask is in close contact with the mouth and nose of the wearer; wherein the exhaust valve connection port and the purification cylinder connection port are separated from each other and are independently constructed. The cleaning cylinder connecting port portion includes: a through portion, and a communication hole is formed, the communication hole penetrating the hood and a cover is connected to the purification cylinder; abutting portion is formed on one side of the through portion and has a diameter larger than a diameter of the through portion to abut against an inner side surface of the nasal mask; and a mounting portion is formed a suction hole formed in the protruding portion of the purification cylinder on the other side of the penetration portion; and a purification cartridge fastening ring fastened to the through portion of the head cover and connected to the webbing; The through portion is formed with a pressing block that presses the purifying cartridge fastening ring into a portion facing the abutting portion, and forms a block, the tab corresponding to the pressing block being The soft portion of the purifying cartridge fastening ring exerts an elastic force to fasten the pressing block and the block; the purifying cylinder forms a pressing protrusion along the periphery of the protruding portion, and is formed with a seating groove in the purifying When the cartridge is fastened to the cleaning cartridge connection port, a pressing protrusion pressing the sealing member, wherein the seating groove places a sealing member on a side of the cleaning cartridge fastening ring facing the pressing protrusion; the exhaust valve connecting port portion includes: a dredging portion Forming a dredging hole and internally providing an exhaust valve penetrating the hood and the nasal mask and communicating with the exhaust valve cover; a shoulder formed on one side of the dredging portion and having a larger than a diameter of the diameter of the dredge portion and abutting against an inner side surface of the nasal mask; and an exhaust valve fastening ring having a block end portion formed on the inner peripheral surface and a block step formed on the outer peripheral surface, wherein the card a block end portion fastened to a hook formed on an outer peripheral surface of the dredging portion, the block step being fastened with a block formed on an inner circumferential surface of the exhaust valve cover; the webbing comprising: a connecting string disposed in the a rear lower portion of the head cover abuts the back of the head cover against the back of the wearer, and has a buckle at each end and extends toward the cleaning cylinder connection opening; and an adjustment cord at the head a rear upper portion of the cover extends toward the connection port of the purification cylinder, two a distal end penetrates the connecting ring formed by the cleaning cartridge fastening ring and is bound by the locking buckle; the hood further includes: a fixing portion that provides a ring-shaped hole to embed the adjusting rope of the webbing And forming a through state to prevent the adjusting rope from slipping; the webbing, the two ends of the adjusting rope are connected to the connecting rope by the buckle, according to which the pulling rope is pulled according to pulling Said the connecting rope. A hood-type gas mask according to claim 1, wherein the face lens further comprises a folding tool to provide a portion capable of partially folding the face lens, the folding tool to be part of the face lens The intensity is weakened into a line shape to fold the face lens. The hood-type gas mask according to claim 1, wherein the lock includes: a connecting piece, one end of which is coupled to the connecting ring in an off-axis rotation state, and a tip portion is disposed at the other end portion; the clamp ring is rotatably fixed to the connecting piece in a state of being embedded in the connecting piece, and the adjusting wire is inserted inward to be wound around the other side in a curved state. According to the tensile force of the adjusting rope generated while pulling the adjusting rope, the connecting piece is rotated off-axis, and accordingly, the adjusting rope wound on the other side is closely attached while rotating the other side with one side as the center. At the tip of the connecting piece, the adjusting cord is clamped together with the connecting piece; and the fixing tool is such that one side of the clamping ring is rotatably fixed to the connecting piece. The hood-type gas mask according to claim 3, wherein the fixing tool has an inclined block formed on both sides of one side of the connecting piece on one side of the clamping ring and perpendicular to the a straight block of the tilting block, which is inserted by the tilting block and inserted into the tilting block and the linear block by the tilting block, is clamped by the tilting block and the straight block, and is further movably constrained to the One side of the connecting piece. The hood-type gas mask according to claim 1, further comprising: a coupling member that detachably couples the exhaust valve cover to the exhaust valve fastening ring, the coupling member including a block protrudingly formed on an inner circumferential surface of the exhaust valve cover; and a block step formed on an outer circumferential surface of the exhaust valve fastening ring to chuck and fasten the card; the card The end of the block that is jammed by the block step forms a semi-circular cross section, whereby it is detachably bound by the exhaust valve fastening ring. The hood-type gas mask according to the first aspect of the invention, wherein the outer peripheral surface of the mounting portion and the inner peripheral surface of the suction hole are respectively formed with a plurality of mounting portion fastening projections having a spiral shape and The suction hole fastens the protrusion to fasten the outer circumferential surface of the mounting portion and the inner circumferential surface of the suction hole.