CN202933403U - Multifunctional digitization three-proofing (moisture proofing, salt spray proofing and fungus proofing) mask device - Google Patents
Multifunctional digitization three-proofing (moisture proofing, salt spray proofing and fungus proofing) mask device Download PDFInfo
- Publication number
- CN202933403U CN202933403U CN 201220605169 CN201220605169U CN202933403U CN 202933403 U CN202933403 U CN 202933403U CN 201220605169 CN201220605169 CN 201220605169 CN 201220605169 U CN201220605169 U CN 201220605169U CN 202933403 U CN202933403 U CN 202933403U
- Authority
- CN
- China
- Prior art keywords
- proofing
- headgear
- mask
- subsystem
- communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The utility model provides a multifunctional digitization three-proofing (moisture proofing, salt spray proofing and fungus proofing) mask device. The multifunctional digitization three-proofing mask device at least comprises a mask subsystem and a communication and filter unit subsystem, wherein the mask subsystem is a head cover with a transparent window, and the communication and filter unit subsystem is provided with a waistband; the multifunctional digitization three-proofing mask device is characterized in that the transparent window is arranged in the front of the head cover of the mask subsystem, a headset and a microphone are arranged in the head cover, an air inlet is arranged on the top of the head cover, and an air outlet is arranged on the lower end of the head cover; the communication and filter unit subsystem is composed of a communication control module and a filtration module and is powered by a storage battery, wherein the communication control module is composed of a main circuit board, two antenna circuit boards, an LCD (Liquid Crystal Display), an LED indicator, a press key, the headset and the microphone which are connected; and the filtration module is a filter cartridge with a draught fan, and the filter cartridge is communicated with the air inlet through a ventilation hose. The multifunctional digitization three-proofing mask device has the advantages that a conventional suction type structure is changed into a positive-pressure blowing-in type structure, the design of a large viewing window ensures a good visual field, and multiple good communication modes are achieved.
Description
Technical field
The utility model belongs to gas defence utensil field, is the gas defence utensil with communication function, particularly the anti-mask means of multifunctional digital three, that is: the anti-mask of MTK3 type multifunctional digital three.
Background technology
Existing breathing mask adopts the breathing pattern of suction-type usually, under rugged environment, uses very difficultly, and communication function is very simple and crude, the staff speedily carry out rescue work wait work progress in mutually between and and control general headquarters can not be linked up well.
Toxicity teaching and research room of The Fourth Military Medical University fully investigates on the basis of domestic and international chemical defence apparatus present situation in conjunction with the highest gas defence achievement in research of domestic military research, military communication control technology and the domestic production state of the art, has proposed Design Conception and the functional requirement of MTK3 system product.This project demand is developed the three anti-and a novel chemical defence equipments of communication in the top standard.
The utility model content
The purpose of this utility model is to provide the anti-mask means of multifunctional digital three, changes traditional suction-type structure into forced draft formula structure, and the design of simultaneously large form has guaranteed the good visual field, and has multiple good communication mode.
The technical scheme of utility model is the anti-mask of a kind of type multifunctional digital three, which comprises at least face shield subsystem and communication and filter subsystem, the face shield subsystem is the headgear that transparency window is arranged, communication and filter subsystem are furnished with waistband, it is characterized in that: there is transparency window in the headgear front of face shield subsystem, there is respectively an earphone left and right sides, there is microphone below, earphone and microphone are buried in the headgear inboard, an air inlet is arranged at the headgear top, there is gas outlet lower end, and gas outlet is provided with check valve; Communication and filter subsystem are to consist of communication control module and filtering module, and their fixedly mount in the enclosure and are suspended on waistband, and by storage battery power supply; Communication control module is by circuit main board and two antenna circuit boards and the conducting of LCD liquid crystal display, antennal interface is the SMA coaxial radio-frequency connector, antenna exposes, LED light and button and circuit main board welding conducting, and circuit main board is also by cable and two earphones and microphone conducting; Filtering module is the cartridge filter with blower fan, and cartridge filter is by steam hose and air inlet conducting, and wind direction is in headgear.
The light transmittance of described transparency window >=89%, and the field range of transparency window requires as follows: half face shield binocular field of view >=65%; The half face shield below visual field >=35%; The large eye of full facepiece mask window total visual field >=70%; The large eye of full facepiece mask window binocular field of view >=55%; The large eye of the full facepiece mask window below visual field >=35%; Full facepiece mask eyes window total visual field >=65%; Full facepiece mask eyes window binocular field of view >=24%; The full facepiece mask eyes window below visual field >=35%.
The intensity of described headgear is under standard testing, and the full facepiece mask headgear bears the 150N pulling force and within 10 seconds, do not occur disrumpent feelingsly, and the demifacet headgear bears the 50N pulling force and do not occur disrumpent feelings in 10 seconds; Headgear has anti-flammability, according to the regulation of 6.15.3 in GB2626-2006, carries out, and after flame time is no more than 5 seconds.
Described LCD liquid crystal display, LED light and button are fixedly mounted on another shell and are suspended on waistband, and with the circuit main board conducting.
There is the solid filtering thing described cartridge filter inside, and the cartridge filter outer surface has some air vents, and the solid filtering thing must not expose from air vent, and there is blower fan at the cartridge filter rear.
Described blower fan is centrifugal fan, and working method is exhausting, and air is sent into the air inlet of headgear again through cartridge filter by blower fan, and air output >=500ML/ second, fan noise is less than 40dB.
Described battery is under all functions load condition, and the work duration is greater than 8 hours.
Described steam hose has good telescopic resilience, still guarantees that air-flow is unobstructed while spending bending to 180, and does not change in 15 seconds by standard testing internal pressure value.
Described communication control module have externally propaganda directed to communicate, personnel, talking and higher level converse three kinds of modes, between personnel, conversation ultimate range is 50 meters, with command centre conversation ultimate range be 800 meters.
Characteristics of the present utility model are: 1, have and the advantage such as wear conveniently, material is durable, meet the anti-requirements of army's mark three;
2, there is the good visual field, the design of comfortable forced draft and gas defence reliably and filter means, facilitate the use of staff in operation use;
3, there is good communication signal and multiple communication modes, make the safety of staff in work progress that effective assurance arranged.
The accompanying drawing explanation
Below in conjunction with embodiment, the utility model is further described:
Fig. 1 is the structure connection diagram of MTK3 type multifunctional digital three anti-masks;
Fig. 2 is the schematic diagram of the face shield subsystem of MTK3 type multifunctional digital three anti-masks;
Fig. 3 is the schematic diagram in the transparency window horizontal field of view zone of MTK3 type multifunctional digital three anti-masks;
Fig. 4 is the schematic diagram in the transparency window vertical visual field zone of MTK3 type multifunctional digital three anti-masks.
In figure: 1, headgear; 2, transparency window; 3, earphone; 4, microphone; 5, steam hose; 6, circuit main board; 7, antenna; 8, LCD liquid crystal display; 9, LED light and button; 10, cartridge filter; 11, blower fan; 12 waistbands; 13, battery; 14, air inlet; 15, gas outlet.
The specific embodiment
As shown in Figure 1, the anti-mask of MTK3 type multifunctional digital three is to consist of face shield subsystem and communication and two parts of filter subsystem, and the face shield subsystem is the headgear 1 that transparency window 2 is arranged, and is worn over head during use, communication and filter subsystem are furnished with waistband 12, are worn over waist during use.
It is to be to consist of communication control module and filtering module two parts that communication and filter divide, they are arranged on an enclosure jointly, shell is suspended on waistband 12, communication control module and filtering module are by battery 13 power supplies, battery 13 is under all functions load condition, and the work duration is greater than 8 hours.
Communication control module is by a circuit main board 6 and two antenna circuit board conductings, and antennal interface is the SMA coaxial radio-frequency connector, and antenna 7 exposes, and antenna 7 guarantees acceptance that can be unimpeded and transmits.
Circuit main board 6 also with 8 conductings of LCD liquid crystal display, LCD liquid crystal display 8 can make the staff directly see work and communication state.
LED light and button 9 and circuit main board 6 welding conductings, button can switch different communication modes, have externally altogether propaganda directed to communicate, personnel, talking and higher level converse three kinds of modes, between personnel, conversation ultimate range is 50 meters, with command centre conversation ultimate range be 800 meters.
Filtering module is the cartridge filter 10 with blower fan 11, and there is the solid filtering thing cartridge filter 10 inside, and the cartridge filter outer surface has some air vents, and the solid filtering thing must not expose from air vent, cartridge filter 10 rear connecting fans 11.Filtrate is maintained secrecy, and is similar to the things such as carbon, resin, has three anti-filter toxic effect fruits.Blower fan 11 is centrifugal fan, and working method is exhausting, and air is sent into the air inlet 14 of headgear 1 again through cartridge filter 10 by blower fan 11, and air output >=500ML/ second, fan noise is less than 40dB.The air-supply of blower fan 11 has guaranteed comfortable forced draft system, has guaranteed the eupnea of staff in work progress.
As shown in Figure 2, the face shield subsystem is the headgear 1 that transparency window 2 is arranged, headgear 1 an earphone 3 each side arranged, the below of headgear 1 also has microphone 4.
Earphone 3 and microphone 4 all are buried in headgear 1 inside, and by cable and circuit main board 6 conductings, realize staff and extraneous communication.
Because needs meet high-and low-temperature resistance, the characteristics such as anticorrosion, headgear 1 should have the characteristics of the following aspects:
1, basic demand:
(1) headgear 1 edge should be level and smooth, without obvious corner angle and burr, without the bubble-tight defect of impact;
(2) headgear 1 should be combined closely in face, and without obviously tenderness sense, the fixed system of headgear should be able to be according to wearer's the adjusting that needs;
(3) on headgear 1, removable parts should be easy to change;
(4) should to look thing true for the transparency window 2 of headgear 1, and the measure that prevents eyeglass knot mist is arranged;
(5) the headgear material should be nontoxic, nonirritant, be harmless to the health and can clean and disinfect;
(6) metal material on headgear should carry out anti-corrosion treatment.
2, high and low temperature adaptability:
Between each step, the headgear temperature was recovered room temperature more than 4 hours.
3, anti-flammability: according to the regulation of 6.15.3 in GB2626-2006, carry out, after flame time is no more than 5 seconds.
4, the large visual field: the light transmittance of transparency window 2 >=89%, and the field range of transparency window 2 meets the requirement of following table:
5, high strength: by standard testing, result meets following requirement:
The full facepiece mask headgear should be able to bear the pulling force of 150N, 10 seconds duration, does not occur disrumpent feelings;
The half face shield headgear should be able to bear the pulling force of 50N, 10 seconds duration, does not occur disrumpent feelings.
6, the headgear material is corrosion-resistant, acid and alkali-resistance, and weatherability is good.Meet the Chinese adult head dummy, headgear contains Earphone with microphone and microphone and air outlet, and headgear is worn firmly convenient, can complete and wear within 10 seconds, headgear need to be by head, the neck parcel, headgear need to the neck no-float, give the wearer comfortable and can not bring expiratory dyspnea.Microphone and earphone must be buried in headgear, and earphone is over against ear, each of left and right.
System fully demonstrates " people-machine-ring " factor aspect shape-designing, when guaranteeing the equipment performance index request, adopts the design principle of " small-sized, light weight, modularization ".Should reduce as far as possible system weight under the condition that does not affect equipment performance, the gross weight of system can not be greater than 3 ㎏.System colors be take ground force's camouflage fatigue tone as main, should adopt low-purity as far as possible, the color of low lightness, and local small position can adopt the color of high-purity, high brightness.With reference to GJB2873-97 " the Ergonomics design criterion of military equipment and facility ".Shape-designing, in line with practical, economical, basic principle attractive in appearance, fully meets people's physiology, psychic science requirement.Put forth effort to accomplish that practicality combines with attractive in appearance
This system is wearing, Portable protective device, takes into full account the operation and the instructions for use that adapt to the people, to get rid of the impact of poor environment on human body, guarantees that the operator can work safe, comfortable and efficiently.What in the face shield subsystem, the transparency window visual field should be enough is open, transparency window must be comfortable without closely being attached to around face, in the situation that head and eyeball are motionless, horizontal vision area and vertical vision area, as shown in Figure 3 and Figure 4.
In auditory function, the earphone design attitude is reasonable, and earphone is applicable to apart from the distance of ear, for making up the sensitivity difference of left and right ear, adopts biphone.Microphone position mouth position center in headgear is upper and lower, and position is reasonable, avoids the hum that intracavity gas brings to cause the obstacle of conversing.Headgear should have good thermal diffusivity, and the carbon dioxide that the heat that skin distributes and breathing produce can fully effectively be discharged outside headgear.Be provided with the drinking-water interface in headgear, can conveniently quote in the course of the work tubbiness mineral water, the water in plain boiled water and Portable kettle.Headgear need to be by whole head parcel, and under condition of work, headgear is accompany movement with head movement.The headgear material will have the absorbing sweat heat sinking function, and the quality softness can not be affected by environment and hardening occurs, and becomes fragile, and enlarges and dwindle.Headgear is dressed simple and reliable, should not select from the head down sleeve type to dress.
Communication and filter position are wound around the waist dead ahead of human body, and device is wound around solid and reliable, does not fall easily landing.There is good contact relation with human body.Waistband is under off working state in automatic retraction communication and filter.Tension force is suitable.The waistband bayonet socket is installed efficient and convenient.The liquid crystal display putting position is reasonable, in the situation that the head fine motion can be directly perceived, clearly sees clearly.The form press button meets ergonomics.
The abundant ingress of air of cartridge filter, bend over the people, in the situation of sitting work, must not hinder air inlet, and cartridge filter considers to adopt quick-detachment and installation.Adopt if possible two blower fans, cartridge filter can be emitted on to the waist both sides.
The coupling part of communication filter device and face shield wants elasticity good, can adopt the vest type wear structure, and vent hose and cable are hidden wherein.Radial displacement must not should occur with the various postures under people's work state in all flexible pipe and cables of imbedding wherein.
Whole system is convenient to clean under off working state.
Communication device shell mechanism design should have good manufacturability, inheritance, and should guarantee to there is enough mechanical strengths, firm, reliable and secure.Consider that Operation and maintenance are convenient, adopt standard component as far as possible, general part, removable unit and assembly adopt the modular organization had in modular combining structure and each assembled unit as far as possible, should improve standardization level as far as possible, make it easy to produce, the shell protection grade, for anti-pouring type, meets waterproof requirement, the shell open opening that do not have, the lid of shell or parting surface should be provided with sealing ring.Material selects to meet military standard material, national standard material, industry standard material.Material itself all has hypotoxicity, corrosion resistance and chemical property good, and with should not be combined to acidity or alkaline gas with atmosphere after air contacts.Should not select inflammable or combustion-supporting material.Enter to adopt organic fibrous material in the face shield subsystem, should consider mould protection and the impact of shrinking.After finished product immersion steam 24 hours dry the processing, should meet the requirements.Fibre should become grass green.
Fastening selecting should be reasonable, and meet the requirement of China the countries concerned standard or industry standard, and securing member kind and the quantity of use are few as much as possible.When the needs specific (special) requirements, allow screw special is installed and is equipped with specific purpose tool.Screw-nut and other securing members should be used corrosion resistant metal to make or do anti-corrosion treatment.Except the part fixing with securing member, the whole part that the fixed form of all parts should make was when single fixture lost efficacy and unlikely generation is loosening, and often the position of dismounting, should adopt quick-detachment to obtain to deviate from trip bolt.Avoid, at nonmetal middle use screw thread, in the time of if required, should using metal insert.
The selection of components and parts should meet the capable performance requirement of equipment, should select in the following order components and parts: meet national standard, meet industry standard, meet company standard, selected components and parts should have the normal supply of material source of goods.The quick detachable connector is selected in the selection of connector as far as possible, should avoid identical connector is installed on adjacent position, in the time can't avoiding, should take the Anti-misplug measure.The connector of promising cooperation should be stamped crown cap or plastics, rubber over cap.
Selecting of switch considers that principal element is: structure, Starting mode, electric shock characteristic, environmental suitability, insulating properties, life-span etc.Rotary switch should have mechanical detent mechanism reliably, in order to make each, goes out a position.The installation of tumbler switch should make shift bar in the vertical direction for upper and lower mode of operation, and being operating as on horizontal direction left and towards the operator.General inapplicable slide switch.
The structure of the present embodiment and embodiment 1 is basic identical, and different is that LCD liquid crystal display 8, LED light and button 9 are fixedly mounted on another shell and are suspended on waistband 12, and with circuit main board 6 conductings.
Be hung with two shells on waistband 12, circuit main board 6 and cartridge filter 10 are arranged in a shell, another has LCD liquid crystal display 8 and LED light and button 9, operation and demonstration are independent of circuit main board like this, the equipment that the staff can will operate and show from waistband 12 takes off, the convenient observation and operation.The damage of external environment to liquid crystal, with transparency protected form, avoided in LCD liquid crystal display 8 outsides simultaneously.
In the utility model, circuit main board 6 adopts pcb board, and uses the EMC design, with the purpose that can realize communication, control and demonstration, is as the criterion, and does not do special requirement.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (9)
1. multifunctional digital three is prevented mask means, which comprises at least face shield subsystem and communication and filter subsystem, the face shield subsystem is the headgear that transparency window is arranged, communication and filter subsystem are furnished with waistband (12), it is characterized in that: there is transparency window (2) in the headgear of face shield subsystem (1) front, there is respectively an earphone (3) left and right sides, there is microphone (4) below, earphone (3) is buried in headgear (1) inboard with microphone (4), an air inlet (14) is arranged at headgear (1) top, there is gas outlet (15) lower end, gas outlet (15) is provided with check valve, communication and filter subsystem are to consist of communication control module and filtering module, and their fixedly mount in the enclosure and be suspended on waistband (12) above, and are powered by battery (13), communication control module is by circuit main board (6) and two antenna circuit boards and LCD liquid crystal display (8) conducting, antennal interface is the SMA coaxial radio-frequency connector, antenna (7) exposes, LED light and button (9) and circuit main board (6) welding conducting, circuit main board (6) is also by cable and two earphones (3) and microphone (4) conducting, filtering module is with the cartridge filter of blower fan (11) (10), and cartridge filter (11) is by steam hose (5) and air inlet (14) conducting, and wind direction is in headgear (1).
2. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: the light transmittance of described transparency window (2) >=89%, and the field range of transparency window (2) requires as follows: half face shield binocular field of view >=65%; The half face shield below visual field >=35%; The large eye of full facepiece mask window total visual field >=70%; The large eye of full facepiece mask window binocular field of view >=55%; The large eye of the full facepiece mask window below visual field >=35%; Full facepiece mask eyes window total visual field >=65%; Full facepiece mask eyes window binocular field of view >=24%; The full facepiece mask eyes window below visual field >=35%.
3. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: the intensity of described headgear (1) is under standard testing, the full facepiece mask headgear bears the 150N pulling force and within 10 seconds, does not occur disrumpent feelingsly, and the demifacet headgear bears the 50N pulling force and do not occur disrumpent feelings in 10 seconds; Headgear (1) has anti-flammability, according to the regulation of 6.15.3 in GB2626-2006, carries out, and after flame time is no more than 5 seconds.
4. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: described LCD liquid crystal display (8), LED light and button (9) are fixedly mounted on another shell and are suspended on waistband (12) upper, and with circuit main board (6) conducting.
5. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: there is the solid filtering thing described cartridge filter (10) inside, the cartridge filter outer surface has some air vents, and the solid filtering thing must not expose from air vent, and there is blower fan (11) at cartridge filter (10) rear.
6. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: described blower fan (11) is centrifugal fan, working method is exhausting, be that air is sent into the air inlet (14) of headgear (1) again through cartridge filter (10) by blower fan (11), air output >=500ML/ second, fan noise is less than 40dB.
7. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: described battery (13) is under all functions load condition, and the work duration is greater than 8 hours.
8. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: described steam hose (5) has good telescopic resilience, still guarantee that air-flow is unobstructed while spending bending to 180, and do not change in 15 seconds by standard testing internal pressure value.
9. according to the anti-mask means of multifunctional digital three described in claim 1, it is characterized in that: described communication control module have externally propaganda directed to communicate, personnel, talking and higher level converse three kinds of modes, between personnel, conversation ultimate range is 50 meters, with command centre conversation ultimate range be 800 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220605169 CN202933403U (en) | 2012-11-16 | 2012-11-16 | Multifunctional digitization three-proofing (moisture proofing, salt spray proofing and fungus proofing) mask device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220605169 CN202933403U (en) | 2012-11-16 | 2012-11-16 | Multifunctional digitization three-proofing (moisture proofing, salt spray proofing and fungus proofing) mask device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202933403U true CN202933403U (en) | 2013-05-15 |
Family
ID=48317668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220605169 Expired - Fee Related CN202933403U (en) | 2012-11-16 | 2012-11-16 | Multifunctional digitization three-proofing (moisture proofing, salt spray proofing and fungus proofing) mask device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202933403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974050A (en) * | 2012-11-16 | 2013-03-20 | 中国人民解放军第四军医大学 | Multi-functional digital three-proofing mask |
-
2012
- 2012-11-16 CN CN 201220605169 patent/CN202933403U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974050A (en) * | 2012-11-16 | 2013-03-20 | 中国人民解放军第四军医大学 | Multi-functional digital three-proofing mask |
| CN102974050B (en) * | 2012-11-16 | 2015-04-22 | 中国人民解放军第四军医大学 | Multi-functional digital three-proofing mask |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102974050B (en) | Multi-functional digital three-proofing mask | |
| CN109363285A (en) | Multifunctional power safety helmet | |
| CN108576961A (en) | Power construction operation field informationization intelligent work takes | |
| CN110074501A (en) | A kind of wearable equipment for the mobile inspection operation of substation equipment maintenance and repair | |
| CN210447893U (en) | Air breathing mask with wireless display module and infrared camera shooting function | |
| CN202933403U (en) | Multifunctional digitization three-proofing (moisture proofing, salt spray proofing and fungus proofing) mask device | |
| CN106174833A (en) | Multifunctional safety helmet | |
| CN113371157A (en) | Diving suit with vital sign monitoring system | |
| CN207707374U (en) | A kind of Novel fire fighting helmet | |
| CN208943301U (en) | A kind of explosion-proof mask of gas defence | |
| CN207838053U (en) | A kind of combination type air respiratory protection system | |
| CN212117209U (en) | Double-turning protective mirror type protective cover | |
| CN216453563U (en) | Intelligent wearable device | |
| CN109123875A (en) | A kind of crash helmet | |
| CN206808757U (en) | A kind of emergency rescue firefighting helmet | |
| CN210278019U (en) | Air breathing mask provided with FPC external display module and infrared camera | |
| CN206830226U (en) | A kind of miner's guard system | |
| CN209628678U (en) | Power construction operation field informationization intelligent work clothes | |
| CN209643971U (en) | A kind of blind safety helmet | |
| CN206641437U (en) | A kind of helmet mounting structure with information transfer capability | |
| CN215767396U (en) | Novel intelligent thermal infrared imager face shield for fire control | |
| CN209751992U (en) | be provided with communication function's sky breathing mask | |
| CN107191219A (en) | A kind of miner's guard system | |
| CN204543320U (en) | A kind of Dustproof nasal obstruction | |
| CN111773575B (en) | Combined safety fire-fighting communication helmet and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20151116 |
|
| EXPY | Termination of patent right or utility model |