Modular gas mask with high protection reliability

Abstract

The invention relates to the technical field of personal protection equipment, in particular to a modular gas mask with high protection reliability, and mainly solves the technical problem that the reliability of a sealing frame and an expiration valve is obviously reduced in the large-amplitude action process of an existing gas mask. The gas mask comprises a mask body, a sealing frame and an expiration valve, the sealing frame is of a closed-loop structure and is arranged on the edge of the inner side of the mask body, the sealing frame is of a double-reverse-folded-edge structure, the double-reverse-folded-edge structure comprises a first folded edge close to the center side and a second folded edge close to the edge side, and the first folded edge and the second folded edge are bent oppositely; the expiration valve comprises a mounting cylinder fixed on the mask body, and the mounting cylinder is provided with an inner valve assembly and an outer valve assembly. The sealing frame of the gas mask can achieve double-sealing protection and is not prone to being separated from the face of a person. Meanwhile, the expiration valve is provided with an inner valve assembly and an outer valve assembly, and the airtight performance of the mask can be improved; through cooperation of the two aspects, the protection reliability of the mask can be maintained in the large-amplitude action process.

Description

Technical Field

[0001] The present invention relates to the technical field of personal protective equipment, in particular to a modular gas mask with high protection reliability. Background Art

[0002] A gas mask is a personal protective equipment used to protect the user's respiratory organs, eyes and face from harmful substances such as toxic gases, dust, smoke, radioactive particles, etc.

[0003] The protection factor of a gas mask is one of the most important indicators for evaluating protective reliability. However, when testing existing gas masks for this factor, it was found that the protection factor often drops significantly during large movements, such as jumping and talking loudly, affecting the overall protection factor evaluation of the gas mask. Furthermore, these large movements can cause leakage of contaminated air, potentially harming the operator. Analysis of the test process and structure of the gas mask revealed no significant differences in the airtightness test results of the gas mask itself. This suggests that the problem arises during the use of the gas mask, resulting from a significant decrease in the reliability of the sealing frame and exhalation valve during large movements.

[0004] Therefore, there is an urgent need for a gas mask that still can ensure the reliability of sealing frame and exhalation valve during the large-scale movement process. Summary of the Invention

[0005] In order to overcome the technical defect of the existing gas mask that the reliability of the sealing frame and the exhalation valve is significantly reduced during large-scale movements, the present invention provides a modular gas mask with high protection reliability.

[0006] The modular gas mask with high protection reliability provided by the present invention includes a mask body, and further includes the mask body, characterized in that it also includes: A sealing frame having a closed-loop structure and disposed on the inner edge of the cover body, wherein the sealing frame has a double-inverted folded edge structure, comprising a first folded edge close to the center side and a second folded edge close to the edge side, wherein the first folded edge and the second folded edge are bent toward each other; The exhalation valve comprises a mounting cylinder fixed on a mask body, wherein the mounting cylinder is provided with inner and outer valve components.

[0007] Optionally, the first folded edge is L-shaped formed by a connecting edge and a folded edge, the connecting edge is connected to the inner side of the cover body, the folded edge is bent toward the second folded edge, and the second folded edge is connected to the inner side of the cover body and inclined toward the first folded edge.

[0008] Optionally, each layer of the valve assembly includes a support ring, connecting ribs, a mounting rod and a valve plate. The support ring is coaxially fixed on the inner wall of the mounting tube. There are multiple connecting ribs and they are all arranged along the radial direction of the support ring. Multiple connecting ribs converge at the center of the support ring to form a mounting position. The mounting rod is inserted and fixed on the mounting position. The valve plate is located on the outside of the connecting ribs and its center is fixed on the mounting rod. The valve plate is made of elastic material, and the edge of the valve plate is sealed and overlapped on the support ring in the natural state. The edge of the valve plate is detached from the support ring in the exhalation state.

[0009] Optionally, the mounting position is a mounting hole coaxial with the mounting tube, the mounting rod is inserted into the mounting hole and fixed on both sides by means of protrusions.

[0010] Optionally, a tank joint is provided on the cover body, and the tank joint is connected to the gas filter canister through a conversion device, and the conversion device is used to achieve the sealing of the tank joint when the gas filter canister is not installed and to release the sealing of the tank joint when the gas filter canister is installed.

[0011] Optionally, the tank joint includes a connecting disc, a convex ring, and a connecting tube, the connecting disc includes a solid edge portion and a hollow center portion, the edge portion is used to connect to the cover body, the convex ring is provided on the outside of the connecting disc and located at the junction of the edge portion and the center portion, and the connecting tube is provided on the outside of the connecting disc and located at the outer edge of the edge portion; The conversion device includes a transfer tube, a mounting seat, and a sealing gasket. The transfer tube is used to be fixedly connected to the connecting tube. The outer end of the transfer tube is provided with a connecting portion. The mounting seat is slidably connected to the transfer tube and can move axially. The sealing gasket is fixed to one end of the mounting seat facing the connecting disk. The mounting seat is also provided with an elastic member for driving it to move toward the connecting disk so that the sealing gasket abuts against the convex ring in a natural state to achieve sealing of the tank joint. The canister is screwed onto the connection portion and when rotated, it links the mounting seat to move away from the connection disk so that the sealing gasket is separated from the convex ring.

[0012] Optionally, a hollow mounting plate is fixed in the adapter tube, the mounting seat is a barrel-shaped structure, the barrel side wall of the mounting seat is provided with a semi-closed slide groove, the mounting seat is slidably connected to the mounting plate through the slide groove and the barrel bottom abuts against the outer side of the mounting plate, and the elastic member is a spring pressed between the mounting plate and the sealing gasket.

[0013] Optionally, a through hole is provided at the bottom of the barrel of the mounting seat and a guide curved surface is extended inwardly from the hole wall of the through hole, and a linkage ear is fixed to the canister. When the canister is screwed on the connecting part, the linkage ear extends into the mounting seat and the guide curved surface is rotated to disengage the sealing gasket from the convex ring.

[0014] Optionally, an anti-glare lens socket is further provided on the outer side of the cover body, and a corrective lens socket is further provided on the inner side of the cover body.

[0015] Optionally, a talker is further provided on the outer side of the cover body, and an electroacoustic talk interface and a drinking water interface are provided on the talker.

[0016] The technical solution provided by the present invention has the following advantages compared with the prior art: The modular gas mask with high protection reliability provided by the present invention has a sealing frame designed as a double reverse folding structure. When worn, the first folding edge and the second folding edge can both be in close contact with the person's face, thereby achieving double sealing protection. The two folding edges are bent towards each other, and when worn under pressure, the two folding edges are close to each other to form an integral structure, which is not easy to separate from the person's face. The effect is particularly significant during large-scale movements. The exhalation valve of the gas mask is provided with an inner and outer layer of valve components. A physiological chamber is formed between the two layers of valve components, which can reduce the leakage coefficient of the exhalation valve and meet the technical indicators of the dead space of the mask, thereby improving the airtightness of the mask. Through the cooperation of the above two aspects, the protection reliability of the gas mask can be greatly improved, and the protection reliability can be maintained during large-scale movements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic diagram showing the overall structure of a gas mask according to an embodiment of the present invention; Figure 2 A schematic diagram showing the inner structure of a gas mask according to an embodiment of the present invention; Figure 3 A schematic diagram showing the structure of an exhalation valve in an embodiment of the present invention; Figure 4 A schematic diagram of the assembly structure of the tank joint and the conversion device in an embodiment of the present invention is shown.

[0020] In the picture: 100, housing; 110, anti-glare lens socket; 120, corrective lens socket; 130, intercom; 140, electroacoustic intercom interface; 150, drinking water interface; 200, sealing frame; 210, first folding edge; 220, second folding edge; 300, exhalation valve; 310, mounting cylinder; 320, valve assembly; 321, support ring; 322, connecting rib; 323, mounting rod; 324, valve plate; 325, bump; 400, tank joint; 410, connection plate; 411, edge portion; 412, center portion; 420, raised ring; 430, connection cylinder; 500, conversion device; 510, adapter cylinder; 511, connection portion; 512, mounting plate; 520, mounting seat; 521, slide groove; 522, through hole; 523, guide curved surface; 530, sealing gasket; 600. Gas filter canister. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0022] In the description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms based on specific circumstances.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] The following combination Figures 1 to 4 Specific embodiments of the present invention are described in detail.

[0025] This embodiment provides a modular gas mask with high protection reliability, including a mask body 100, a sealing frame 200 and an exhalation valve 300.

[0026] The cover body 100 is a mature structure in this field and will not be described in detail here.

[0027] Among them, the sealing frame 200 is a closed-loop structure and is arranged on the inner edge of the mask body 100. The sealing frame 200 is a double-reverse folded edge structure, which includes a first folded edge 210 close to the center side and a second folded edge 220 close to the edge side, and the first folded edge 210 and the second folded edge 220 are bent toward each other. When in use, the sealing frame 200 is close to the contour edge of the person's face to form a closed cavity between the gas mask and the person's face. On the one hand, this sealing frame 200 structure can provide dual protection. On the other hand, because the two folds are bent toward each other, they can abut against each other when worn under pressure to form a complete structure that is not easy to separate from the person's face and is more suitable for large-scale movements.

[0028] It is easy to understand that both the first folded edge 210 and the second edge need to be made of flexible materials to achieve a sealing effect, which is well known to those skilled in the art.

[0029] It should be noted that the sealing frame 200 of this embodiment is designed with face length and width dimensions based on the two-dimensional distribution data of male face length and width in GB / T2428-1998 "Head and Face Dimensions of Adults", and can better match the human face.

[0030] Specifically, the first folded edge 210 is L-shaped, formed by a connecting edge and a folded edge. The connecting edge is connected to the inner side of the cover body 100, and the folded edge is bent toward the second folded edge 220. The second folded edge 220 is connected to the inner side of the cover body 100 and tilted toward the first folded edge 210. The first folded edge 210 located on the inner side is designed to be L-shaped, which has a better protective effect.

[0031] The exhalation valve 300 includes a mounting tube 310 fixed on the mask body 100 , and the mounting tube 310 is installed with inner and outer valve assemblies 320 .

[0032] It will be readily understood that the exhalation valve 300 is a well-established structure in the art, primarily functioning as a one-way valve. It opens only during exhalation and remains closed during inhalation to prevent the inhalation of toxic gases not filtered by the canister 600. In this embodiment, the exhalation valve 300 is designed with two valve assemblies 320, forming a physiological chamber between the two valve assemblies 320. This reduces the exhalation valve's leakage coefficient while also meeting the mask's dead space specifications, thereby enhancing the mask's airtightness.

[0033] Specifically, each layer of the valve assembly 320 includes a support ring 321, connecting ribs 322, a mounting rod 323 and a valve piece 324. The support ring 321 is coaxially fixed on the inner wall of the mounting tube 310. There are multiple connecting ribs 322 and they are all arranged along the radial direction of the support ring 321. Multiple connecting ribs 322 converge at the center of the support ring 321 and form a mounting position. The mounting rod 323 is inserted and fixed on the mounting position. The valve piece 324 is located on the outside of the connecting rib 322 and its center is fixed on the mounting rod 323. The valve piece 324 is made of elastic material, and in the natural state, the edge of the valve piece 324 is sealed and overlapped on the support ring 321. In the exhalation state, the edge of the valve piece 324 is separated from the support ring 321. When exhaling, the gas reaches the valve plate 324 through the gap between the connecting ribs 322, causing the edge of the valve plate 324 to deform and separate from the support ring 321, thereby exhaling the gas; while when inhaling, the edge of the valve plate 324 is tightly attached to the support ring 321 under the action of its own elasticity to complete the seal, and the gas cannot enter.

[0034] More specifically, the mounting location is a mounting hole coaxial with the mounting tube 310. The mounting rod 323 is inserted into the mounting hole and secured on both sides by means of protrusions 325. In actual design, the mounting rod 323 can be designed as a single piece with the two protrusions 325 as separate pieces. Alternatively, the mounting rod 323 can be designed as a two-piece structure with the two protrusions 325 as one piece with each of the two sections of the mounting rod 323.

[0035] In addition, a tank joint 400 is provided on the mask body 100 of the gas mask of this embodiment, and the tank joint 400 is connected to the gas filter canister 600 through a conversion device 500. The conversion device 500 is used to achieve the sealing of the tank joint 400 when the gas filter canister 600 is not installed and to release the sealing of the tank joint 400 when the gas filter canister 600 is installed.

[0036] It should be noted that when wearing a gas mask, the canister 600 needs to be regularly replaced. When the canister 600 is removed, the canister connector 400 is open to the outside world. This can lead to the inhalation of toxic gases when replacing the canister 600 in a contaminated environment, endangering the wearer's health. Therefore, this embodiment adds a conversion device 500 to the canister connector 400 and improves the canister 600. This allows the conversion device 500 to seal the canister connector 400 when the canister 600 is removed, and to release the seal of the canister connector 400 when the canister 600 is installed, thereby ensuring wearer health.

[0037] Specifically, the tank joint 400 includes a connecting disk 410, a convex ring 420 and a connecting tube 430. The connecting disk 410 includes a solid edge portion 411 and a hollow center portion 412. The edge portion 411 is used to connect to the cover body 100. The convex ring 420 is provided on the outside of the connecting disk 410 and is located at the junction of the edge portion 411 and the center portion 412. The connecting tube 430 is provided on the outside of the connecting disk 410 and is located on the outer edge of the edge portion 411. The conversion device 500 includes an adapter tube 510, a mounting seat 520 and a sealing gasket 530. The adapter tube 510 is used to fix the connection to the connecting tube. 430, a connecting portion 511 is provided at the outer end of the adapter tube 510, the mounting seat 520 is slidably connected in the adapter tube 510 and can move axially, the sealing gasket 530 is fixed to one end of the mounting seat 520 facing the connecting disk 410, and the mounting seat 520 is also provided with an elastic member for driving it to move toward the connecting disk 410 so that the sealing gasket 530 abuts against the convex ring 420 in a natural state to achieve the sealing of the canister joint 400; the canister 600 is screwed onto the connecting portion 511 and when rotated, the mounting seat 520 is linked to move away from the connecting disk 410 to make the sealing gasket 530 disengage from the convex ring 420. When personnel remove the gas filter canister 600, the mounting seat 520 together with the sealing gasket 530 are moved close to the connecting disk 410 under the action of the elastic member so that the sealing gasket 530 is tightly against the convex ring 420 to achieve the sealing of the canister joint 400; when installing the gas filter canister 600, the mounting seat 520 and the sealing gasket 530 will be linked to move away from the connecting disk 410 during the rotation of the gas filter canister 600, so that the sealing gasket 530 is separated from the convex ring 420, thereby releasing the seal of the canister joint 400.

[0038] More specifically, a hollow mounting plate 512 is fixed within the adapter tube 510. The mounting seat 520 is a barrel-shaped structure. A semi-enclosed slot 521 is provided on the barrel sidewall of the mounting seat 520. The mounting seat 520 is slidably connected to the mounting plate 512 via the slot 521, with the barrel bottom abutting the outer side of the mounting plate 512. The elastic member is a spring pressed between the mounting plate 512 and the sealing gasket 530. In its natural state, the spring exerts an inward force on the mounting seat 520 and the sealing gasket 530, forcing the sealing gasket 530 to rest tightly against the raised ring 420. The sealing gasket 530 is retained in place by the abutment between the barrel bottom of the mounting seat 520 and the mounting plate 512.

[0039] More specifically, the bottom of the mounting base 520 is provided with a through hole 522, and a guide curved surface 523 extends inward from the wall of the through hole 522. A coupling ear is secured to the canister 600. When the canister 600 is screwed onto the connecting portion 511, the coupling ear extends into the mounting base 520 and, through rotation, activates the guide curved surface 523 to disengage the sealing gasket 530 from the raised ring 420. The through hole 522 functions like a keyhole, the guide curved surface 523 functions like the teeth of a lock, and the coupling ear functions like a key. The coupling ear and the guide curved surface 523 cooperate to convert the rotational motion of the coupling ear into axial motion of the mounting base 520, thereby disengaging the sealing gasket 530 from the raised ring 420.

[0040] In detail, the adapter tube 510 and the connecting tube 430 are connected by threads, the sealing gasket 530 and the mounting seat 520 are also connected by threads, and the canister 600 and the connecting part 511 are connected by a screw buckle, and when the canister 600 is rotated to the locked state, the linkage ear just links the sealing gasket 530 to disengage from the convex ring 420.

[0041] It should be noted that the canister 600 is a mature structure in this field. This embodiment only adds a linkage ear on the inner side thereof, so that when the canister 600 is screwed, the linkage ear can be used to link the movement of the mounting seat 520 and the sealing gasket 530.

[0042] In addition, the gas mask of this embodiment is provided with an anti-glare lens socket 110 on the outside of the housing 100 and a corrective lens socket 120 on the inside of the housing 100. In strong light environments, a person can wear anti-glare lenses through the anti-glare lens socket 110; a person can also wear optical correction lenses through the corrective lens socket 120 according to their vision.

[0043] In addition, a talker 130 is provided on the outer side of the cover body 100 of the gas mask of this embodiment, and an electroacoustic talk interface 140 and a drinking water interface 150 are provided on the talker 130.

[0044] It is easy to understand that the intercom 130 is a mature structure in the art. In this embodiment, it is fixed to the outside of the exhalation valve 300. In a noisy environment, people can make electronic calls through the electronic call interface 140 and can supplement water or nutrition through the drinking water interface 150.

[0045] The above is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments, and they should all be covered by the scope of protection of the claims.

Claims

1. A modular gas mask with high protection reliability, comprising a mask body (100), characterized in that: Also includes: A sealing frame (200) having a closed-loop structure and arranged at the inner edge of the cover body (100), wherein the sealing frame (200) has a double-inverted folded edge structure, comprising a first folded edge (210) close to the center side and a second folded edge (220) close to the edge side, wherein the first folded edge (210) and the second folded edge (220) are bent toward each other; The exhalation valve (300) comprises a mounting cylinder (310) fixed on the mask body (100), wherein the mounting cylinder (310) is mounted with inner and outer valve assemblies (320).

2. The modular gas mask with high protection reliability according to claim 1 is characterized in that: The first folded edge (210) is L-shaped formed by a connecting edge and a folded edge portion, the connecting edge portion is connected to the inner side of the cover body (100), the folded edge portion is bent toward the second folded edge (220), and the second folded edge (220) is connected to the inner side of the cover body (100) and is inclined toward the first folded edge (210).

3. The modular gas mask with high protection reliability according to claim 1, characterized in that: Each layer of the valve assembly (320) includes a support ring (321), a connecting rib (322), a mounting rod (323) and a valve piece (324), wherein the support ring (321) is coaxially fixed to the inner wall of the mounting tube (310), a plurality of connecting ribs (322) are provided and are all arranged along the radial direction of the support ring (321), and the plurality of connecting ribs (322) converge at the center of the support ring (321) to form a mounting position, and the mounting rod (323) is inserted and fixed on the mounting position, and the valve piece (324) is located on the outside of the connecting rib (322) and is fixed at its center on the mounting rod (323), and the valve piece (324) is made of elastic material, and in a natural state, the edge of the valve piece (324) is sealed and overlapped on the support ring (321), and in an exhalation state, the edge of the valve piece (324) is separated from the support ring (321).

4. The modular gas mask with high protection reliability according to claim 1, characterized in that: The mounting position is a mounting hole coaxial with the mounting cylinder (310), and the mounting rod (323) is inserted into the mounting hole and fixed on both sides by means of protrusions (325).

5. The modular gas mask with high protection reliability according to any one of claims 1 to 4, characterized in that: The cover body (100) is provided with a canister joint (400), and the canister joint (400) is connected to the gas filter canister (600) via a conversion device (500). The conversion device (500) is used to achieve sealing of the canister joint (400) when the gas filter canister (600) is not installed, and to release the sealing of the canister joint (400) when the gas filter canister (600) is installed.

6. The modular gas mask with high protection reliability according to claim 5, characterized in that: The tank joint (400) comprises a connecting disk (410), a convex ring (420) and a connecting tube (430); the connecting disk (410) comprises a solid edge portion (411) and a hollow center portion (412); the edge portion (411) is used to connect to the cover body (100); the convex ring (420) is arranged on the outside of the connecting disk (410) and is located at the junction of the edge portion (411) and the center portion (412); the connecting tube (430) is arranged on the outside of the connecting disk (410) and is located at the outer edge of the edge portion (411); The conversion device (500) includes a switching tube (510), a mounting seat (520) and a sealing gasket (530), wherein the switching tube (510) is used for fixedly connecting the connecting tube (430), and a connecting portion (511) is provided at the outer end of the switching tube (510), and the mounting seat (520) is slidably connected in the switching tube (510) and can move in the axial direction, and the sealing gasket (530) is fixed to one end of the mounting seat (520) facing the connecting disk (410), and the mounting seat (520) is further provided with an elastic member for driving it to move toward the connecting disk (410) so that in a natural state, the sealing gasket (530) abuts against the convex ring (420) to achieve sealing of the tank joint (400); The canister (600) is screwed onto the connection portion (511) and, when rotated, drives the mounting seat (520) to move away from the connection disk (410) so that the sealing gasket (530) is separated from the convex ring (420).

7. The modular gas mask with high protection reliability according to claim 6, characterized in that: A hollow mounting plate (512) is fixed in the adapter tube (510), the mounting seat (520) is a barrel-shaped structure, and a semi-enclosed sliding groove (521) is provided on the barrel side wall of the mounting seat (520). The mounting seat (520) is slidably connected to the mounting plate (512) through the sliding groove (521), and the barrel bottom abuts against the outer side of the mounting plate (512). The elastic member is a spring pressed between the mounting plate (512) and the sealing gasket (530).

8. The modular gas mask with high protection reliability according to claim 7, characterized in that: The bottom of the mounting seat (520) is provided with a through hole (522), and a guide curved surface (523) extends inwardly from the hole wall of the through hole (522). The canister (600) is fixed with a linkage ear. When the canister (600) is screwed onto the connecting portion (511), the linkage ear extends into the mounting seat (520) and rotates to move the guide curved surface (523) so that the sealing gasket (530) is separated from the convex ring (420).

9. The modular gas mask with high protection reliability according to any one of claims 1 to 4, characterized in that: An anti-glare lens socket (110) is further provided on the outer side of the cover body (100), and a corrective lens socket (120) is further provided on the inner side of the cover body (100).

10. The modular gas mask with high protection reliability according to any one of claims 1 to 4, characterized in that: A talker (130) is further provided on the outside of the cover body (100), and an electroacoustic talk interface (140) and a drinking water interface (150) are provided on the talker (130).

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